Gavian, R. W., & Hamm, W. A. (1957). The American story. D.C. Heath.
Lua i Stíl Chicago (17ú heag.)Gavian, Ruth Wood, agus William Albert Hamm. The American Story. Boston: D.C. Heath, 1957.
Lua MLA (8ú heag.)Gavian, Ruth Wood, agus William Albert Hamm. The American Story. D.C. Heath, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.