Cite
MLA (8th Edition)
Congressional Districts of the 110th Congress of the United States, January 2007-2009. U.S. Dept. of Commerce, Bureau of the Census, 2007.
APA (7th Edition)
Congressional districts of the 110th Congress of the United States, January 2007-2009. (2007). U.S. Dept. of Commerce, Bureau of the Census.
Chicago (17th Edition)
“Congressional Districts of the 110th Congress of the United States, January 2007-2009.” Washington, D.C.: U.S. Dept. of Commerce, Bureau of the Census, 2007.