Freeman, M., & Tubbs, E. V. (1941). The story of our republic. F.A. Davis.
Lua i Stíl Chicago (17ú heag.)Freeman, Melville, agus Eston Valentine Tubbs. The Story of Our Republic. Philadelphia: F.A. Davis, 1941.
Lua MLA (8ú heag.)Freeman, Melville, agus Eston Valentine Tubbs. The Story of Our Republic. F.A. Davis, 1941.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.