We the People Government Publications http://govpubs.lib.umn.edu/index/phtml
The University of Minnesota Library has created a useful Government Publications page covering the United States, U.S. Census, United Nations, European Union, Minnesota, Canada, Guides and Statistics.
Brief Guide to Citing Government Publications http://www.memphis.edu/govpub/citweb.php
The University of Memphis has created a guide to assist students in correctly citing paper, microform and electronic government publications.
California State Library's Government Publications http://www.library.ca.gov/gps
"The California State Library's government publications collection is the only regional depository of federal government information in California and receives all publications distributed by the United States Superintendent of Documents to depository libraries. The Library is also a full depository for California state government publications. In addition, the Library is one of five Patent and Trademark Depository libraries in California."
Citing Government Documents: APA http://www.unk.edu/academics/library.aspx?id=8936
The University of Nebraska Kearney has created a guide to city Federal Agency documents, Congressional documents, Government Document Periodical Articles and Federal Legal References according to the Publication Manual of the American Psychological Association.
Citing Government Information in MLA Style http://www.knowledgecenter.unr.edu/help/manage/government_cite.aspx
The University of Nevada-Reno has developed a comprehensive guide to citing government sources with numerous sample citations included.
GPO Access http://www.gpoaccess.gov/
GPO Access is a service of the U.S. Government Printing Office that provides free electronic access to a wealth of important information products produced by the Federal Government. As of March, 2011, a new GPO site known as FDsys goes into effect at: http://www.gpo.gov/fdsys/