Legal citation is not merely a formatting convention — it is a technical language that practitioners, judges, and academics use to locate, verify, and interrogate the exact authority being invoked. Get it wrong and you may cite a case that was overruled, reference a statute that has since been amended, or produce a footnote that no clerk or colleague can trace. Unlike APA or Chicago, which have broad applicability across disciplines, legal citation systems are closely tied to national legal traditions, court hierarchies, and the particular logic of common law reasoning. Mastering the system used in your jurisdiction is not optional; it is a professional baseline.
This guide explains the four major legal citation systems — OSCOLA (UK and EU), the Bluebook (United States), AGLC (Australia), and the McGill Guide (Canada) — with detailed examples for the source types you will encounter most often.
Most academic citation styles put the author and date at the centre of the reference — the so-called author-date system. Legal citation does something different. The identity of the court, the year of decision, the volume and page of the official law report, and the precise legislative instrument matter far more than any individual author's name.
Legal sources also have a hierarchy that citation must reflect. A binding House of Lords decision from 1975 carries different weight from a persuasive Court of Appeal obiter remark from 2003. A primary Act of Parliament sits above the secondary legislation made under it. Citation conventions encode these distinctions, which is why a legal citation that looks cryptic to an outsider is immediately informative to a trained reader.
Key distinction: Most academic styles use an author-date format for in-text references. Legal citation systems — with the partial exception of some civil law traditions — are almost universally footnote-based, placing the full reference at the bottom of the page rather than in a bracketed aside within the text.
In OSCOLA, the Bluebook, and most Commonwealth systems, you signal a citation in the text with a superscript number, then provide the full reference in a footnote on the same page. On second and subsequent references to the same source, shortened forms are used.
This approach has practical advantages in legal writing: it keeps the text readable for non-specialist judges and clients, while placing the full technical citation where those who need it — clerks, opponents, appellate reviewers — can find it without interrupting the prose.
OSCOLA uses ibid (from the Latin ibidem, meaning "in the same place") when citing the same source twice in succession. The Bluebook uses id. for the same purpose. Both systems allow shortened case names and article titles on second reference.
OSCOLA was developed by the University of Oxford Faculty of Law and is now the dominant citation standard across UK law schools, many EU institutions, and international law journals. The fourth edition — published by Hart Publishing and freely available from the Oxford Law Faculty — is the current authoritative text.
The standard format for a reported UK case is:
Party v Party [Year] Volume Law Report Abbreviation First Page
Example — House of Lords / UK Supreme Court:
Donoghue v Stevenson [1932] AC 562 (HL)
Example — Court of Appeal:
Caparo Industries plc v Dickman [1990] 2 AC 605 (CA)
Where a case is unreported, you cite the neutral citation and, optionally, the database reference:
R (Miller) v Secretary of State for Exiting the European Union [2017] UKSC 5
The court abbreviation in parentheses at the end is included only when it is not obvious from the law report abbreviation itself.
Acts of Parliament are cited by their short title and year, with no comma between them. Chapter numbers are not used in OSCOLA footnotes (though they may appear in a table of legislation).
Human Rights Act 1998
Companies Act 2006, s 172
For statutory instruments:
Civil Procedure Rules 1998, SI 1998/3132, r 44.3
Author, 'Article Title' (Year) Volume Journal Abbreviation First Page
Example:
Andrew Burrows, 'We Do This at Common Law but That in Equity' (2002) 22 OJLS 1
Note that OSCOLA does not use a comma between the volume number and the journal abbreviation, and article titles appear in single quotation marks rather than italics.
Author, Title (edition, Publisher Year) page
Example:
Paul Craig and Gráinne de Búrca, EU Law: Text, Cases, and Materials (6th edn, Oxford University Press 2015) 347
The edition appears before the publisher, enclosed in the same set of parentheses. Page numbers are given without the abbreviation "p" or "pp".
The Bluebook: A Uniform System of Citation is published jointly by the law reviews of Harvard, Yale, Columbia, and the University of Pennsylvania. The 21st edition, released in 2020, is the current standard. It governs citation in federal and state courts, law reviews, legal memoranda, and briefs throughout the United States — though some jurisdictions maintain their own supplementary rules.
The Bluebook distinguishes between two typeface systems: the law review (academic) system and the practitioner system used in court documents and legal memoranda. The examples below follow the practitioner system, which is the more commonly needed in legal practice.
Party v. Party, Volume Reporter Page (Court Year).
Example — United States Supreme Court:
Brown v. Board of Education, 347 U.S. 483 (1954).
Example — Federal Circuit Court:
United States v. Carroll Towing Co., 159 F.2d 169 (2d Cir. 1947).
The court is identified in the parenthetical alongside the year. For the U.S. Supreme Court, the court abbreviation is omitted because "U.S." in the reporter name makes it clear.
Federal statutes are cited by their codified location in the United States Code:
17 U.S.C. § 107 (2018).
For statutes cited by their popular name:
Americans with Disabilities Act of 1990, 42 U.S.C. §§ 12101–12213.
The Bluebook law review format for journal articles uses large and small capitals for the journal name and ordinary roman type for the article title:
Author, Article Title, Volume Journal Name Page (Year).
In practitioner documents, where typeface distinctions are simplified:
Richard Posner, A Theory of Negligence, 1 J. Legal Stud. 29 (1972).
Author, Title page (edition year).
Example:
William M. Landes & Richard A. Posner, The Economic Structure of Tort Law 54 (1987).
Key difference between OSCOLA and Bluebook: OSCOLA places the edition and publisher inside parentheses at the end of the citation, before the page number. The Bluebook places the author in full name (not inverted), the title in italics (in academic mode) or ordinary type (practitioner mode), and the year in its own parenthetical. The ordering and punctuation conventions differ substantially between the two systems.
The Australian Guide to Legal Citation (AGLC), now in its fourth edition and published by the Melbourne University Law Review Association, is the standard used across Australian law schools and courts. Like OSCOLA, it is footnote-based and freely available online.
AGLC follows OSCOLA in many structural respects but has distinct conventions for Australian case law, legislation, and government materials. Cases are cited with the medium-neutral citation where available:
Mabo v Queensland (No 2) (1992) 175 CLR 1.
Plaintiff M70/2011 v Minister for Immigration and Citizenship [2011] HCA 32.
Statutes are cited with jurisdiction abbreviations:
Corporations Act 2001 (Cth).
Fair Work Act 2009 (Cth), s 394.
The jurisdiction in parentheses distinguishes Commonwealth legislation from state Acts with similar names.
The Canadian Guide to Uniform Legal Citation — universally known as the McGill Guide — is published by the McGill Law Journal and is now in its ninth edition. Canada's bijural legal system, which combines common law traditions in nine provinces with the civil law system of Quebec, means the McGill Guide must accommodate both traditions.
For common law cases:
R v Oakes, [1986] 1 SCR 103.
For Quebec civil law, the guide provides citation formats for the Civil Code of Québec and decisions of the Court of Quebec, reflecting the civil law tradition's emphasis on the code rather than precedent as the primary authority.
Civil law vs common law citation traditions: In common law jurisdictions — the UK, US, Australia, Canada outside Quebec — judicial decisions are primary authorities and case citation is central to legal argument. Civil law jurisdictions — France, Germany, Spain, Quebec — treat the code as the foundational text and cite doctrine and scholarship alongside legislation. This means civil law citation systems give greater prominence to academic commentary (doctrine) and rely less on chains of precedential case citations.
Inserting "(Craig and de Búrca, 2015)" in the body of a legal submission instead of a footnote number is a fundamental error in any of these systems. Legal citation is footnote-first.
Statutes are frequently amended. Always check that you are citing the version in force at the relevant time. OSCOLA, the Bluebook, and AGLC all have specific conventions for citing historical versions of legislation — use them when the current version differs from the version that applied to your facts.
Law report abbreviations are standardised and cannot be improvised. "AC" means Appeal Cases; "QB" means Queen's Bench (now "KB" for King's Bench following the accession of Charles III). Confusing these signals ignorance of the sources themselves.
Citing a 300-page judgment to the first page only, when you are relying on a specific passage, is poor practice in every system. OSCOLA uses a comma followed by the page number: [1932] AC 562, 580. The Bluebook uses the same comma-separated format.
The definitive texts for each system are:
University law libraries — including those at Oxford, Harvard Law School, Melbourne Law School, and McGill — maintain online citation guides that address jurisdiction-specific edge cases and are updated more frequently than the printed editions.
When a jurisdiction-specific court rule conflicts with the general style guide, the court rule prevails. Always check the procedural rules of the specific court or tribunal before filing any document.
Legal citation demands precision at every level: the right reporter, the right year bracket or parenthesis, the right section reference, the right pinpoint. Doing this consistently across a dissertation, a research report, or a professional submission is time-consuming even for experienced lawyers.
DEEPNOTIS supports OSCOLA and more than 2,800 other citation styles — including the Bluebook, AGLC, and a wide range of jurisdiction-specific court formats. Import your legal sources, select your required style, and the platform generates correctly formatted footnotes and bibliographies, applying the exact punctuation and ordering rules each system demands.
You can also use citation labels to organise sources by issue, chapter, or argument strand before exporting — useful when a single document draws on cases, statutes, and journal articles across multiple legal areas.
Faculty of Law, University of Oxford. (2012). OSCOLA: Oxford University Standard for the Citation of Legal Authorities (4th edn). https://www.law.ox.ac.uk/research-subject-groups/publications/oscola
Harvard Law Review Association. (2020). The Bluebook: A Uniform System of Citation (21st edn). https://www.legalbluebook.com
Melbourne University Law Review Association. (2018). Australian Guide to Legal Citation (4th edn). https://law.unimelb.edu.au/mulr/aglc
McGill Law Journal. (2018). The Canadian Guide to Uniform Legal Citation (9th edn). Carswell.