Legal Citation: The Bluebook

Why Citation Matters

Legal citation is not merely a formality. It serves critical functions in legal writing and practice:

• Verification — Citations allow readers to locate and verify the authorities you rely upon
• Credibility — Proper citation demonstrates professionalism and attention to detail
• Authority weight — Citation format conveys information about the type and strength of authority
• Ethical obligation — Lawyers have professional duties to cite accurately and not misrepresent authorities
• Efficiency — Standardized citation allows readers to quickly assess sources without hunting for details

Bluebook vs. ALWD: A Brief Comparison

Two citation manuals dominate American legal writing:

The Bluebook

The Bluebook: A Uniform System of Citation is the most widely used citation manual. It is published by the law reviews of Harvard, Yale, Columbia, and Penn. The Bluebook is required by most law schools and courts.

ALWD Guide to Legal Citation

The ALWD Guide (formerly the ALWD Citation Manual) is published by the Association of Legal Writing Directors. It aims to be clearer and more user-friendly than the Bluebook while producing nearly identical citations in most cases.

Which Should You Use?

• Follow your professor's or court's requirements — When in doubt, ask
• Most law schools use the Bluebook — This guide focuses on Bluebook format
• Most citations are identical — The manuals differ mainly in organization and some minor details
• Courts may have local rules — Always check local citation rules, which may deviate from both manuals

Understanding the Bluebook's Structure

The Bluebook has two main sections that serve different purposes. Understanding this structure is essential to using it correctly.

The Bluepages

The Bluepages contain rules for practitioners—lawyers writing briefs, memos, and other court documents. Key features:

• Only two typefaces: ordinary type and italics (or underscoring)
• Case names, book titles, and article titles are italicized (or underlined)
• No large-and-small capitals (those are for law reviews only)

The Whitepages

The Whitepages contain rules for academic writing—law review articles and scholarly work. Key features:

• Three typefaces: ordinary type, italics, and large-and-small capitals
• Case names in footnote citations appear in ordinary type (italicized only in text)
• Book titles and certain other sources set in large-and-small capitals

How to Navigate the Bluebook

1. Start with the Bluepages — Find the general rule for your source type
2. Cross-reference the Whitepages — The Bluepages refer you to detailed Whitepage rules
3. Check the Tables — Tables at the back provide abbreviations, court names, and jurisdiction-specific rules
4. Use the Index — The back index helps you find specific topics

Citing Cases

Case citations are the most common citations in legal writing. Master these forms first.

Basic Case Citation Format

A full case citation contains these elements in order:

Case Name Rules

• Use only the first party on each side (not "Smith, et al.")
• Omit "The" as the first word
• Abbreviate words listed in Table 6 (e.g., "Corporation" becomes "Corp.")
• Use "v." (lowercase, with period) to separate parties
• Italicize or underline the full case name, including "v.", in both textual sentences and citation sentences
• Be consistent: choose either italics or underscoring throughout your document

Common Reporter Abbreviations

• U.S. — United States Reports (Supreme Court)
• S. Ct. — Supreme Court Reporter
• F.4th, F.3d, F.2d — Federal Reporter (Circuit Courts)
• F. Supp. 3d, F. Supp. 2d — Federal Supplement (District Courts)
• Regional reporters: A.3d, N.E.3d, N.W.2d, P.3d, S.E.2d, S.W.3d, So. 3d

Court Identification Rules

• U.S. Supreme Court: Omit court designation (the "U.S." reporter indicates it)
• Federal circuit courts: Include circuit (e.g., "9th Cir.")
• Federal district courts: Include district (e.g., "S.D.N.Y.")
• State courts: Follow Table 1 for each state's conventions

Pinpoint Citations (Pincites)

A pinpoint citation directs the reader to the specific page where the cited material appears. Always include a pincite when referring to specific language or a specific point from a case.

Short Forms for Cases

After giving a full citation, you may use short forms in subsequent references. The choice of short form depends on how recently and where you last cited the case.

Id.

Use id. when citing the immediately preceding authority (and only that authority). Italicize "id." and capitalize it at the start of a citation sentence.

Short Form with Case Name

When you cannot use id. (because an intervening citation exists), use a short form with the case name:

Citing Statutes

Statutory citations identify the code, title or chapter, section number, and (for unofficial codes) the publisher and date.

Federal Statutes

United States Code (Official)

Unofficial Codes

When the official U.S.C. is not current, cite to an unofficial code:

• U.S.C.A. — United States Code Annotated (West/Westlaw)
• U.S.C.S. — United States Code Service (Lexis)

State Statutes

State statute citation formats vary significantly. Always check Table 1 of the Bluebook for the specific state's format.

Short Forms for Statutes

After a full citation, you may use short forms:

• Id.: Id. or Id. [section] 1984.
• Section only: [section] 1983. (if the code is clear from context)

Citing Constitutions

Constitutional citations are straightforward. Do not include a date for provisions currently in force.

U.S. Constitution

State Constitutions

Citing Regulations

Code of Federal Regulations (C.F.R.)

Federal Register

Cite the Federal Register for proposed rules or final rules not yet in the C.F.R.:

Citing Secondary Sources

Treatises and Books

Law Review Articles

Restatements

Legal Encyclopedias

Citation Signals and Their Meaning

Signals precede citations and tell the reader how the cited authority relates to your proposition. Using signals correctly is crucial—incorrect signal use can constitute misrepresentation.

No Signal

Use no signal when the cited authority:

• Directly states the proposition
• Identifies the source of a quotation
• Identifies an authority referred to in the text

Example: The court held that summary judgment was improper. Smith v. Jones, 500 F.3d 100, 105 (9th Cir. 2007).

See

Use see when the cited authority clearly supports the proposition but does not directly state it. The proposition follows from the authority with an inferential step.

Example: Courts generally disfavor such agreements. See Smith v. Jones, 500 F.3d 100, 105 (9th Cir. 2007).

See also

Use see also for additional authority that supports the proposition when other authority has already been cited. Often used with a parenthetical explaining the relevance.

Example: [After other citations] See also Brown v. Board, 450 F.3d 200, 210 (5th Cir. 2006) (reaching the same conclusion under Texas law).

Cf.

Use cf. when the cited authority supports a proposition different from the main proposition but sufficiently analogous to lend support. Always use a parenthetical to explain the relevance.

Example: Cf. Miller v. Davis, 300 F.3d 50, 55 (2d Cir. 2005) (holding that similar conduct violated the parallel state statute).

Compare ... with ...

Use compare when juxtaposing authorities that are similar or that reach compatible conclusions, and the comparison itself supports your proposition.

Example: Compare Smith v. Jones, 500 F.3d at 105 (applying the "actual knowledge" standard under federal law), with Green v. State, 200 A.3d 50, 55 (Md. 2006) (adopting a materially identical standard under state law).

Contrast ... with ... 22nd ed.

Use contrast when the authorities reach opposing results or take conflicting approaches, and the contrast itself supports your proposition. This signal is new in the 22nd edition (Rule 1.2 / B1.2); it separates the "opposing authorities" function that compare previously served.

Example: Contrast Smith v. Jones, 500 F.3d at 105 (requiring actual knowledge), with Brown v. White, 400 F.3d 50, 55 (3d Cir. 2006) (requiring only constructive knowledge).

But see

Use but see for authority that clearly supports a proposition contrary to the main proposition. This is the negative equivalent of see.

Example: But see Miller v. Davis, 300 F.3d 50, 60 (2d Cir. 2005) (holding that such agreements are enforceable).

But cf.

Use but cf. for authority supporting a proposition analogous to the contrary of the main proposition. Always use a parenthetical.

See generally

Use see generally for helpful background material. This is often used to cite secondary sources providing useful context.

Example: See generally Jane Smith, The Future of Contract Law, 125 Harv. L. Rev. 1001 (2024) (discussing the evolution of contract doctrine).

Parentheticals: When and How to Use Them

Parentheticals appear at the end of a citation and provide additional information about the cited authority.

When Parentheticals Are Required

• After cf. and but cf. signals (explain relevance)
• For concurring or dissenting opinions
• To indicate the weight of authority (e.g., "en banc," "per curiam")
• When the relevance of authority is not clear from context

When Parentheticals Are Helpful

• After see also (explain the additional value)
• To provide relevant facts that make the authority more persuasive
• To indicate the holding or reasoning when not evident from your text
• To note important procedural posture

Parenthetical Format

• Begin with a lowercase letter (unless starting with a proper noun)
• Use present participle phrases ("holding that," "finding that," "noting that")
• Omit the subject (start with the verb)
• No period inside the parenthetical

Quotations and Alterations

When to Quote

• The language is authoritative and carries legal significance
• The exact wording matters (statutory text, legal standards)
• Paraphrasing would lose important nuance
• The source's phrasing is particularly eloquent or memorable

Quotation Marks and Block Quotes

• Short quotations (under 50 words): Use quotation marks, run into text
• Long quotations (50+ words): Use block quote format (indented, no quotation marks)

Alterations

When you modify quoted text, you must signal the change:

Brackets [ ]

• Use to indicate changes to letters (capitalization, verb tense): "[T]he court held..."
• Use to add clarifying words: "The court held that [the defendant] violated the statute."
• Use to indicate changed letters: "The part[ies] agreed..."

Ellipses ...

• Use to indicate omitted words within a sentence: "The court held ... that the claim failed."
• Use four dots (period + ellipsis) for omissions that include the end of a sentence
• Do not use ellipsis at the beginning or end of a quotation (it's assumed you're excerpting)

Emphasis

• Add emphasis with italics and note "(emphasis added)" in the parenthetical
• Preserve original emphasis and note "(emphasis in original)"

The "(Citation Modified)" Parenthetical 22nd ed.

The 22nd edition introduces a new parenthetical — (citation modified) — under Rule B5.3. When you strip a quotation of internal quotation marks, brackets, ellipses, internal citations, or footnote reference numbers, or modify capitalization without brackets, you may use a single "(citation modified)" parenthetical instead of listing each change separately (e.g., "(internal quotation marks omitted) (citations omitted) (brackets omitted)").

• Use is optional. You may still use the traditional, itemized parentheticals if you prefer.
• Readability changes only. The parenthetical may not be used to flag substantive modifications to quoted text.
• Not "(cleaned up)." The Bluebook does not recognize the "(cleaned up)" parenthetical that gained popularity in practice. Use "(citation modified)" instead.

Short Forms and Id.

The Id. Rule

Id. is the most common short form. Use it to cite the immediately preceding authority—but only if that citation contains just one source.

When You CAN Use Id.

• The immediately preceding citation is to only one source
• You are citing that same source again

When You CANNOT Use Id.

• The preceding citation contained multiple sources (e.g., a string cite)
• An intervening citation to a different source has appeared
• You are starting a new section or the document has a significant break

Id. Format

• Italicize (or underline) "Id."
• Capitalize when beginning a citation sentence
• For same page: Id.
• For different page: Id. at 105.
• For different section: Id. [section] 15.

Other Short Forms

When id. is not available, use these short forms:

Cases

• Smith, 500 F.3d at 107.
• 500 F.3d at 107. (if unambiguous from context)

Statutes

• Id. or Id. [section] 1984.
• [section] 1983. (if the code is clear)

Secondary Sources

• Smith, supra, at 1015.
• Wright & Miller, supra, [section] 1217.

Common Citation Mistakes

Avoid these frequent errors that can cost you points or credibility:

Case Citation Errors

• Missing pincite: Always include a pinpoint citation when referring to specific content
• Wrong reporter: Use the correct reporter for the court level (U.S. for Supreme Court, F.3d/F.4th for circuits)
• Incorrect court abbreviation: Check Table 1 for proper abbreviations
• Using "at" incorrectly: Use "at" only for pincites, not for the first page of a case
• Forgetting party names: Always include at least one party name in text or citation

Signal Errors

• Using see when no signal is appropriate: If the authority directly states the proposition, use no signal
• Omitting parenthetical after cf.: Always explain the analogy
• Wrong signal for contrary authority: Use but see or contra, not see

Id. Errors

• Using id. after string cite: Cannot use id. when preceding citation has multiple sources
• Using id. across sections: Provide full citation at the start of new sections
• Forgetting "at" before pincite: Write "Id. at 105" not "Id. 105"
• Not italicizing: Id. must be italicized

Quotation Errors

• Missing alterations: All changes to quoted text must be indicated with brackets
• Improper ellipsis: Use three dots within a sentence, four when crossing sentences
• Block quote threshold: Use block format for 50+ words
• Missing attribution: Every quotation needs a citation

Format Errors

• Spaces in reporter abbreviations: "F.3d" not "F. 3d"
• Period placement: Periods go inside quotation marks in American English
• Section symbol: Use the section symbol ([section]), not "Section" or "Sec."
• Inconsistent typeface: Maintain consistent formatting (italics vs. underline)

Citation Tools

Modern legal research platforms include citation features. Use them—but understand their limitations.

Westlaw: Copy with Reference

• How to use: Click "Copy with Reference" on any document
• What it provides: Full citation in Bluebook format
• Limitations: May not match your document's format requirements; no pincites; may need editing

Lexis: Copy Citation

• How to use: Click the citation icon or use the Copy dropdown
• Options: Choose citation format (Bluebook, ALWD, etc.)
• Limitations: Same as Westlaw—always verify and add pincites

Word Add-ins

• Westlaw: Drafting Assistant can check and format citations
• Lexis: Lexis for Microsoft Office offers similar features
• Third-party tools: Various citation management software exists

Why You Still Need to Know the Rules

Recommended Workflow

1. Research: Use platform tools to gather citations as you research
2. Draft: Insert full citations with pincites as you write
3. Review: Check each citation against Bluebook rules
4. Polish: Verify signals, short forms, and parentheticals
5. Proofread: Final check for formatting consistency

Quick Reference Summary

Essential Citation Components

• Cases: Name, Volume, Reporter, Page, (Court Year)
• Statutes: Title, Code, Section, (Publisher Year for unofficial)
• Regulations: Title, C.F.R., Section, (Year)
• Constitutions: Jurisdiction, Article/Amendment, Section

Signal Hierarchy (Supportive to Contrary)

1. [no signal] — directly states
2. See — clearly supports
3. See also — additional support
4. Cf. — analogous support
5. Compare ... with ... — juxtaposes similar authorities
6. Contrast ... with ... — juxtaposes opposing authorities 22nd ed.
7. But see — clearly contradicts
8. But cf. — analogous contradiction
9. See generally — background

Next Steps

Continue building your legal research and writing skills:

• Citators — Learn to verify that your cited authorities remain good law
• Case Law Research — Master finding the cases you need to cite
• Secondary Sources — Understand how to cite and use secondary authorities