Ferguson, N. (2011). Civilization. Allen Lane.
Lua i Stíl Chicago (17ú heag.)Ferguson, Niall. Civilization. London: Allen Lane, 2011.
Lua MLA (9ú heag.)Ferguson, Niall. Civilization. Allen Lane, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.