If cite checking, pulling sources, or researching in secondary sources, you may find confusing abbreviations used in the footnotes. Use the following selected resources to help you identify the sources being abbreviated.
The Bluebook by
A Uniform System of Citation: The Bluebook is the definitive style guide for legal citation in the United States. For generations, law students, lawyers, scholars, judges, and other legal professionals have relied on The Bluebook's uniform system of citation in their writing. In a diverse and rapidly changing legal profession, The Bluebook continues to provide a systematic method by which members of the profession communicate important information to one another about the sources and legal authorities upon which they rely in their work.
Prince's Dictionary of Legal Abbreviations by
Generally the go-to source for American legal abbreviations, although it covers more.
Cardiff Index to Legal Abbreviations by
This database allows you to search for the meaning of abbreviations for English language legal publications, from the British Isles, the Commonwealth and the United States, including those covering international and comparative law.
Guide to Foreign and International Legal Citations by 
Index to legal citations and abbreviations by 
Latin American Legal Abbreviations by 
World Dictionary of Legal Abbreviations by 