The Bluebook: A Uniform System of Citation is the commonly used system of legal citation in the United States. Students and lawyers are often expected to abide by its edicts but find it challenging because it is so densely packed with rules. This guide was developed to try to break down some of this density and help you try to make sense of it all.
UW Law Community: Contact the library (firstname.lastname@example.org) and ask for a free 90-day trial to the online versions of the 20th and 21st editions of the Bluebook!
The producers of The Bluebook offer a Quick Style Guide with examples of many common citation types (cases, statutes, books, etc.). Registration is free. (You'll be invited to purchase a subscription to The Bluebook Online.)