APA (7th ed.) Citation

Godfrey, J. (1980). 1204, the unholy crusade. Univ. Press.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Godfrey, John. 1204, the Unholy Crusade. Univ. Press, 1980.

Warning: These citations may not always be 100% accurate.