Thorp, W. (1944). American issues ([Enl. ed.] Vol. 1. The social record.). Lippincott.
Lua i Stíl Chicago (17ú heag.)Thorp, Willard. American Issues. [Enl. ed.] Vol. 1. The social record. Philadelphia: Lippincott, 1944.
Lua MLA (8ú heag.)Thorp, Willard. American Issues. [Enl. ed.] Vol. 1. The social record. Lippincott, 1944.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.