APA (7th ed.) Citation

United States. Government Printing Office. (2007). GPO history. [U.S. G.P.O.].

Chicago Style (17th ed.) Citation

United States. Government Printing Office. GPO History. [Washington, D.C.]: [U.S. G.P.O.], 2007.

MLA (8th ed.) Citation

United States. Government Printing Office. GPO History. [U.S. G.P.O.], 2007.