Reading a legal citation gets easier once you see that almost every one follows the same skeleton: the name or title of the source, a volume or title number, an abbreviation telling you where it was published, a page or section pointing to the exact spot, and a date. Learning how to read legal citations means learning that skeleton once and then recognizing which bones get swapped out when you move from a court case to a statute to a regulation.
The publication abbreviation is the part that changes most. For court decisions it names a “reporter.” For statutes it names a “code.” For regulations it names either a code of rules or an official gazette. The abbreviations are tightly standardized, which is why a reader in one state can decode a citation written in another.
Case Citations
A case citation starts with the two party names, separated by “v.” and usually italicized. After the names come the volume number, the reporter abbreviation, the page where the opinion begins, and a parenthetical with the court and year.
Take Fictional Co. v. Example Corp., 500 U.S. 100 (2020). The case starts on page 100 of volume 500 of the United States Reports, and the Supreme Court decided it in 2020. There’s no court abbreviation inside the parenthetical because “U.S.” only publishes Supreme Court decisions, so naming the court would be redundant.
The Main Reporters
The United States Reports (“U.S.”) is the official reporter for the Supreme Court. Federal appellate decisions sit in the Federal Reporter, which has rolled through series as volumes piled up: “F.” for the first, “F.2d” for the second, “F.3d” for the third, and “F.4th” for the fourth, which began publication in 2021. Federal trial court opinions appear in the Federal Supplement, cited as “F. Supp.,” “F. Supp. 2d,” or “F. Supp. 3d.”
Pinpoint Citations
A pinpoint citation, or “pincite,” sends the reader to the specific page that supports your point rather than to the first page of the opinion. It goes right after the opening page, separated by a comma: Fictional Co. v. Example Corp., 500 U.S. 100, 105 (2020). The relevant material is on page 105; the case starts on page 100. Use a pincite whenever you quote, paraphrase, or point to a specific passage. Citing only the first page of a long opinion forces the reader to hunt, and judges notice.
Parallel Citations
The same opinion sometimes appears in more than one reporter. A parallel citation lists each one. Some state courts require them so that readers with different reporter sets can find the case. When required, the official reporter goes first, then the unofficial ones.
Federal Statute Citations
Federal statutes live in the United States Code, organized by numbered topical titles. A U.S.C. citation has four parts: the title number, “U.S.C.,” a section symbol (§) and section number, and the code edition year in parentheses. So 18 U.S.C. § 1001 (2024) is section 1001 of title 18. The year is the one printed on the code volume you consulted, not the year the statute was enacted or last amended.
Some federal laws haven’t been classified into the U.S.C., or are better cited as originally enacted. Those get a Statutes at Large citation: volume number, “Stat.,” and starting page. A law cited as 107 Stat. 25 begins on page 25 of volume 107.1Library of Congress. Federal Statutes: A Beginner’s Guide – Citations for and Popular Names of Statutes
State Statute Citations
State statute citations follow the same logic as federal ones, with the state code’s abbreviation swapped in. Each state names and organizes its code differently, so the abbreviation changes by jurisdiction. Nebraska looks like Neb. Rev. Stat. § 33-114 (1998). California might appear as Cal. Penal Code § 187 (West 2024). The Bluebook’s Table 1 lists the correct abbreviation for every state code. Because the formats vary so widely, checking the table before citing a state statute from an unfamiliar jurisdiction saves rework later.
Constitutional Citations
Constitutional citations begin with “U.S. Const.” and then name the structural subdivision: article, amendment, section, or clause. Article and amendment numbers use Roman numerals; section and clause numbers use Arabic. A few patterns:
- Article and section: U.S. Const. art. I, § 9, cl. 2
- Amendment: U.S. Const. amend. XIV, § 1
- Preamble: U.S. Const. pmbl.
No date appears, because the Constitution is treated as currently operative. Short forms are limited too. Other than “Id.” when repeating the immediately preceding citation, there is no accepted abbreviated form.
Regulation Citations
Federal agencies publish rules in two places. Final, codified rules go into the Code of Federal Regulations (C.F.R.). Proposed rules, notices, and newly issued final rules awaiting codification appear in the Federal Register (Fed. Reg.).
Code of Federal Regulations
A C.F.R. citation uses the same title-abbreviation-section pattern as the U.S.C.: title number, “C.F.R.,” section symbol and number, and the C.F.R. edition year. For example, 29 C.F.R. § 1980.103 (2024). To cite an entire part instead of a single section, use “pt.” in place of the section symbol: 29 C.F.R. pt. 1980 (2024). Cite the most recent edition available.
Federal Register
A Federal Register citation names the document or rule, then gives the volume number, “Fed. Reg.,” the starting page, and the exact issue date in parentheses. For example: Importation of Fruits and Vegetables, 60 Fed. Reg. 50379 (Sept. 29, 1995). Volume before the abbreviation, page after, like a case reporter.
Short-Form Citations
Once you’ve given a full citation, later references can be shortened. The common tools are “Id.,” shortened case names, and “supra.”
Id.
“Id.” refers to the immediately preceding citation. Standing alone, it points to the exact same page or section you just cited. To send the reader to a different page in the same source, add “at” and the new page: Id. at 435. “Id.” only works when the preceding citation references a single source; if your last citation listed multiple authorities, “Id.” is ambiguous and shouldn’t be used. It works for cases, statutes, regulations, books, and internet sources, but not for constitutions, except to repeat the identical provision just cited.
Shortened Case Names
When a case was cited in full earlier but another citation has intervened, use a shortened form: one party’s name (usually the first non-governmental one), the volume, the reporter abbreviation, “at,” and the pinpoint. After a full citation to Universal City Studios, Inc. v. Corley, 273 F.3d 429 (2d Cir. 2001), later references can read Corley, 273 F.3d at 435.
Supra
“Supra” covers non-case materials like books, articles, and reports that were cited in full earlier but aren’t the immediately preceding source. The format is the author’s last name, “supra” (italicized), and the new pinpoint. Supra is not used for cases, statutes, or constitutions.
Introductory Signals
Signals are short words placed before a citation to tell the reader how the cited authority relates to the statement in the text. Using the wrong one misstates the strength of your support.
- No signal: the source directly states the proposition or is the source of a quotation. The strongest form of support.
- See: the source clearly supports the proposition, but with a small inferential step. The most frequently used signal and the most frequently misused.
- See also: additional authority supporting the proposition when you’ve already cited other sources with no signal or See.
- Cf.: the source supports by analogy rather than directly. A parenthetical explanation is practically required so the reader understands the comparison.
- Contra: the source directly contradicts the proposition. The negative counterpart of no signal.
Signals are italicized and capitalized when they open a citation sentence.
Electronic and Internet Sources
If a source exists in a printed reporter or code, cite the print version. Electronic databases like Westlaw and Lexis come in mainly when a case or document has no print reporter citation, which can happen with very recent decisions or unpublished opinions. The Bluebook’s Rule 18 governs internet citations and directs writers to the most stable electronic location available. An internet citation includes the author if available, the title, any pagination, the publication date, and the URL.
For cases available only on a commercial database, the citation typically includes the case name, docket number, database identifier and document number, and a pinpoint using an asterisk with a screen or paragraph number rather than a printed page. As more courts post opinions on their own websites, direct links to official court sites are often preferable to commercial database citations.
Which Manual, and Why Local Rules Still Win
Two manuals dominate legal citation in the United States. The Bluebook: A Uniform System of Citation, currently in its 22nd edition, is the standard for most law journals and law school writing programs. The ALWD Guide to Legal Citation, now in its 7th edition, follows a largely compatible format with more examples and extra practitioner guidance. Either manual covers every source type above and many more.
Neither has the final word in every courtroom. Individual courts maintain local citation rules that supplement or override the national standards. Local rules can compress jurisdiction names, use non-standard abbreviations, or follow entirely different conventions. In some states, court rules are compiled alongside statutes and cited accordingly, in formats the Bluebook doesn’t address.2Legal Information Institute. Basic Legal Citation – How to Cite Court Rules Before filing anything, check the court’s local rules. The national manuals teach the default; the court’s rules tell you what that particular judge expects to see.