Ferguson, N. (2005). Colossus: The rise and fall of the American empire. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Ferguson, Niall. Colossus: The Rise and Fall of the American Empire. New York: Penguin Books, 2005.
Lua MLA (8ú heag.)Ferguson, Niall. Colossus: The Rise and Fall of the American Empire. Penguin Books, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.