B10 (p.10-17): Bluepages sources and authorities reference for cases.
Rule 10 (p.94-118): Rule explains all aspects of case citation.
T.1 (p.233-306): Reference for abbreviations of United States jurisdictions used in case citation.
The basic structure of a case citation has at least these four basic elements:
Example: U.S. v. Johnson, 640 F.3d (6th Cir. 2011).
The subheadings under the Cases tab corresponds to each of these elements and provides an in-depth look at each. Each page will provide links to tutorials and practice materials to familiarize you with the basics.
For a general overview of citing cases, take a look at Georgetown Law Library's Bluebook Guide to Citing Cases.