Thorpe, F. N. (1922). The essentials of American government. G.P. Putnam's Sons.
Lua i Stíl Chicago (17ú heag.)Thorpe, Francis Newton. The Essentials of American Government. New York: G.P. Putnam's Sons, 1922.
Lua MLA (8ú heag.)Thorpe, Francis Newton. The Essentials of American Government. G.P. Putnam's Sons, 1922.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.