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Short Form Citations in Bluebook: Rules and Examples

Short Form Citations in Bluebook: Rules and Examples
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    Short Form Citation Bluebook rules let you shorten a source after its first full citation. Once a case, statute, book, or article is cited in full, you may use Id., supra, or an abbreviated form so long as the reader can readily identify the source.

    Built on The Bluebook: A Uniform System of Citation, 21st edition (2020) — the standard used by U.S. courts, law reviews, and law schools. Every example below follows current Rules 4, 10.9, 12.10, 15.10, and 16.9.

    What is a short form citation in Bluebook?

    A short form citation is an abbreviated reference to a source that has already been cited in full earlier in the document. It saves space in footnotes by dropping repeated details. The Bluebook provides three tools: Id., supra, and source-specific short forms.

    Short forms are governed by Rule 4 (for Id., supra, and hereinafter) and by the short-form rule attached to each source type. The goal is always the same — keep the citation short while letting the reader trace it back to the original full citation without effort.

    When can you use a Bluebook short form?

    You may use a short form only after a source has appeared in a full citation, and only when the reader can quickly and unambiguously identify which earlier source you mean. If a shortened cite would be confusing, the Bluebook requires the full citation again.

    A common practitioner guideline is that a short form works when the full citation appears in the same general discussion or within the previous five footnotes. If the full citation is far away, or if several similar sources compete, repeat the full form or add a clarifying supra note reference.

    How do you write a short form case citation?

    A short-form case citation (Rule 10.9) drops the full case name to a single, distinctive party name, then keeps the volume, reporter, the word at, and the pinpoint page. Use the non-governmental party — never shorten to United States or a state name.

    Full (first cite)Miranda v. Arizona, 384 U.S. 436, 444 (1966).

    Short formMiranda, 384 U.S. at 467.

    Full (first cite)Brown v. Board of Education, 347 U.S. 483, 489 (1954).

    Short formBrown, 347 U.S. at 495.

    Anatomy of a Bluebook short form (book, using supra)
    Tribe, supra note 5, at 1310.
    • Tribe — author’s last name only
    • supra — italicized signal pointing backward
    • note 5 — footnote holding the full citation
    • at — pinpoint locator word
    • 1310 — the exact page cited

    When do you use “Id.” in Bluebook?

    Use Id. to cite the source referenced in the immediately preceding citation, when that citation contains only one authority. Id. replaces every repeated element. Add at plus a new page when the pinpoint changes; use Id. alone when the page is identical.

    Id. is always italicized, including its period, and is capitalized when it begins a citation sentence. It is the most compact short form and should be your first choice whenever you cite the same source twice in a row.

    Preceding citeMiranda v. Arizona, 384 U.S. 436, 444 (1966).

    Same source, new pageId. at 471.

    Same source, same pageId.

    Statute, next sectionId. § 1984.

    When do you use “supra” and “hereinafter”?

    Supra (Rule 4.2) refers back to a full citation given earlier, using the author’s name and the footnote number where it first appeared. It works for books, journal articles, and most legislative and secondary materials — but generally not for cases, statutes, constitutions, or regulations.

    The standard form is Author, supra note X, at Y. Use hereinafter in the first full citation to define a short label when a source has no author or when several works by one author would otherwise clash, for example [hereinafter Restatement Third].

    Full journal citeCharles A. Reich, The New Property, 73 Yale L.J. 733, 737 (1964).

    Short form (supra)Reich, supra note 12, at 740.

    Full book citeLaurence H. Tribe, American Constitutional Law 1302 (3d ed. 2000).

    Short form (supra)Tribe, supra note 5, at 1310.

    Short forms for every source type

    Different sources use different short-form tools. Cases and statutes keep an abbreviated citation; books and articles use supra; anything cited twice in a row can collapse to Id. The table below summarizes the current-edition short forms.

    Source Full first citation Short form Rule
    Case Miranda v. Arizona, 384 U.S. 436, 444 (1966). Miranda, 384 U.S. at 467. 10.9
    Statute 42 U.S.C. § 1983 (2018). § 1983. 12.10
    Book Laurence H. Tribe, American Constitutional Law 1302 (3d ed. 2000). Tribe, supra note 5, at 1310. 15.10
    Journal article Charles A. Reich, The New Property, 73 Yale L.J. 733, 737 (1964). Reich, supra note 12, at 740. 16.9
    Any (immediately prior) — Id. at 471. 4.1

    Quick rules to remember

    • Use Id. only when the immediately preceding citation names a single source.
    • Use supra for books and articles, not for cases or statutes.
    • Keep one distinctive party name in short-form case cites.
    • Always italicize Id., supra, and hereinafter, including Id.‘s period.
    • Use at before a pinpoint page in every short form.

    How accurate is this guide, and what are the limits?

    These formats reflect the Bluebook’s 21st edition (2020), the current version at the time of writing. The core short-form rules have been stable across editions, but pinpoint conventions and reporter abbreviations can vary by jurisdiction and by local court rules, which always control over the Bluebook.

    This page covers standard academic and practitioner short forms; it does not replace the full text of Rules 4, 10, 12, 15, and 16, which include edge cases such as parallel citations, internal cross-references, and star pagination. When a citation is unusual — multiple authors, no author, or a source cited dozens of footnotes earlier — verify against the printed Bluebook or your journal’s style sheet before relying on the short form.

    Frequently asked questions

    What is a short form citation in Bluebook?

    It is an abbreviated reference to a source already cited in full earlier in the document, using Id., supra, or a shortened case or statute cite so the reader can trace it back without the full details being repeated.

    When can you use a short form instead of a full citation?

    You can use one only after the source has appeared in a full citation and when the reader can readily identify it — typically within the same discussion or the previous five footnotes. Otherwise, repeat the full citation.

    What is the difference between “Id.” and “supra”?

    Id. points only to the source in the immediately preceding citation. Supra points back to any earlier full citation by author name and footnote number, and is used mainly for books and articles.

    Can you use “supra” for cases in Bluebook?

    Generally no. Under Rule 4.2, supra and hereinafter should not be used for cases, statutes, constitutions, or regulations, except in narrow circumstances such as an exceptionally long source name.

    How do you write a short form case citation?

    Keep one distinctive party name, the volume, the reporter, the word at, and the pinpoint page, for example Miranda, 384 U.S. at 467. Do not shorten to a governmental party such as United States.

    Does “Id.” need to be italicized?

    Yes. Id. is italicized in full, including its period, and it is capitalized when it starts a citation sentence. Add at and a new page number only when the pinpoint changes.

    What does “at” mean in a Bluebook short form?

    at introduces the pinpoint page you are citing within the source. It appears in short-form case cites, Id. references, and supra forms, as in Id. at 471 or Reich, supra note 12, at 740.