Perrett, G. (1973). Days of Sadness Years of Triumph: The American People 1939-1945. University of Wisconsin Press.
Lua i Stíl Chicago (17ú heag.)Perrett, Geoffrey. Days of Sadness Years of Triumph: The American People 1939-1945. Wisconsin: University of Wisconsin Press, 1973.
Lua MLA (9ú heag.)Perrett, Geoffrey. Days of Sadness Years of Triumph: The American People 1939-1945. University of Wisconsin Press, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.