Free & Low-Cost Legal Research

Bluebook

• Introduction to Basic Legal Citation by Peter W. Martin & the Legal Information Institute (LII)
• The Bluebook Uncovered: A Practical Guide to Mastering Legal Citation (21st ed.) by Dionne E. Anthon
• Bluebook Legal Citation System Guide by Harvard Law School Library
• Bluebook Guide by the University of Illinois Law Library
• The Indigo Book by the Public Resource Organization & New York University School of Law

International

• The Oxford University Standard for Citation of Legal Authorities (OSCOLA) by Oxford University

Tools

• Jurism (Juris-M) by Frank Bennett

• Cardiff Index to Legal Abbreviations by Cardiff University