Toynbee Arnold Joseph & Caplan, J. (1972). A study of history (New edition.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Toynbee Arnold Joseph agus Jane Caplan. A Study of History. New edition. London: Oxford University Press, 1972.
Lua MLA (9ú heag.)Toynbee Arnold Joseph agus Jane Caplan. A Study of History. New edition. Oxford University Press, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.