The Bluebook: A Uniform System of Citation (20th ed. 2015), RESERVE KF245 .B58 2015
The new 21st ed. just came out over the summer of 2020.
Several copies are on reserve.
Also available in an online subscription at https://www.legalbluebook.com and as an app for your iPhone or iPad at https://itunes.apple.com/us/app/rulebook/id454619081?mt=8.
Peter W. Martin, Introduction to Basic Legal Citation (2019) http://www.law.cornell.edu/citation Online and available for free, this resource includes an in-depth discussion of how to cite according to The Bluebook.
Mary Miles Prince, Prince’s Dictionary of Legal Citations (9th ed. 2017), KF246 .P73 2011 Alphabetically lists legal sources and provides their abbreviations and examples of how to cite them according to The Bluebook.
Diane E. Anthon, The Bluebook Uncovered: A Practical Guide to Mastering Legal Citation (2015), KF245 .A57 2015
Deborah E. Bouchoux, Cite-Checker: Your Guide to Using The Bluebook (2011), KF245 .B68 Text-based Bluebook citation guide with examples.
Alan L. Dworsky, User’s Guide to the Bluebook (2015), KF245 .D853 2015 A short guide to the most used citation format–meant for practitioners.
Larry L. Teply, Legal Citation in a Nutshell (2016) RESERVE KF245 .T47 2016 Available online in West Study Aids collection.
Interactive Citation Workstation, on LexisNexis.