United States. Office of the Federal Register. (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..
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)United States. Office of the Federal Register. 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.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)United States. Office of the Federal Register. 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.