APA (7th ed.) Citation

Godfrey, J. (1980). 1204, the unholy Crusade. Oxford University Press.

Chicago Style (17th ed.) Citation

Godfrey, John. 1204, the Unholy Crusade. Oxford [u.a.]: Oxford University Press, 1980.

MLA (8th ed.) Citation

Godfrey, John. 1204, the Unholy Crusade. Oxford University Press, 1980.