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..
Lua i Stíl Chicago (17ú heag.)United States. Office of the Federal Register agus 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.
Lua MLA (8ú heag.)United States. Office of the Federal Register agus 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.