United States. Office of the Federal Register & William S. Hein & Company. (1973). The United States government manual. Office of the Federal Register, National Archives and Records Service, General Services Administration : For sale by the Supt. of Docs., U.S. G.P.O..
Chicago-referens (17:e uppl.)United States. Office of the Federal Register och William S. Hein & Company. The United States Government Manual. Washington, D.C.: Office of the Federal Register, National Archives and Records Service, General Services Administration : For sale by the Supt. of Docs., U.S. G.P.O., 1973.
MLA-referens (8:e uppl.)United States. Office of the Federal Register och William S. Hein & Company. The United States Government Manual. Office of the Federal Register, National Archives and Records Service, General Services Administration : For sale by the Supt. of Docs., U.S. G.P.O., 1973.