Cita APA (7a ed.)

Toynbee, A. J., & Somervell, D. C. (1957). A study of history. Oxford University Press.

Cita Chicago Style (17a ed.)

Toynbee, Arnold Joseph, y D. C. Somervell. A Study of History. London [etc.]: Oxford University Press, 1957.

Cita MLA (9a ed.)

Toynbee, Arnold Joseph, y D. C. Somervell. A Study of History. Oxford University Press, 1957.