The 21st Edition Bluebook: A Uniform System of Citation is a genuine, spiral-bound textbook published in 2020 by the Harvard Law Review Association. Authored by the Columbia Law Review, this reference book is designed for law and education students, focusing on the subject area of general legal knowledge. With the language predominantly in English, this textbook offers a comprehensive and authoritative guide to legal citation practices, making it a valuable resource for students and professionals in the field.