Toynbee, A. J. Introduction. The genesis of civilizations (2a ed.).
Lua i Stíl Chicago (17ú heag.)Toynbee, Arnold J. Introduction. The Genesis of Civilizations. 2a ed.
Lua MLA (8ú heag.)Toynbee, Arnold J. Introduction. The Genesis of Civilizations. 2a ed.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.