The Complete Guide to Citing Government Information Resources: a Manual for Social Science & Business Research. Debora Cheney. Bethesda, MD: Lexis Nexis, Congressional Research Service. 3rd ed., 2002. Terrell Reference Desk J 9.5.G37x 2002
This guide uses the Cheney book above to provide a framework. For specifics on citing a document in MLA, APA, Chicago style, etc., its best to look at a style guide, i.e. the ones at the Purdue OWL, but this will help you understand the process.