Assists the legal profession in citing legal authorities according to the rules given in "The Bluebook: A Uniform System of Citation", 21st ed. (2020). This title is a companion to The Bluebook (not a replacement) and applies Bluebook rules to a representative collection of common legal authorities. The citations included are based on Bluebook rules, and the abbreviations are those found in The Bluebook or derived from its guidelines. Besides updating both Bluebook and state court rule references, this edition has been updated to reflect Twenty-First Edition Bluebook revisions. The new edition has reduced its total page count--from 560 pages to 365 pages--in part by placing the citation information contained in T2 Foreign Jurisdictions in a free online database, and in part by having T6 abbreviations cover case names and institutional authors, as well as periodical titles. The various subsections of T13 from the twentieth edition are either contained in an expanded and slightly revised T6 or in the combined single T13 section "Institutional Names in Periodical Titles." Rule 18.8 was added to the twenty-first edition to provide citation guidance for photographs and illustrations.--Publisher.