Friedländer, S. (1967). Prelude to downfall: Hitler and the United States, 1939-1941. Chatto & Windus.
Lua i Stíl Chicago (17ú heag.)Friedländer, Saul. Prelude to Downfall: Hitler and the United States, 1939-1941. London: Chatto & Windus, 1967.
Lua MLA (8ú heag.)Friedländer, Saul. Prelude to Downfall: Hitler and the United States, 1939-1941. Chatto & Windus, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.