APA (7th ed.) Citation

Donovan, J. P. (1950). Pelagius and the Fifth Crusade. University of Pennsylvania Press.

Chicago Style (17th ed.) Citation

Donovan, Joseph Patrick. Pelagius and the Fifth Crusade. Philadelphia: University of Pennsylvania Press, 1950.

MLA (9th ed.) Citation

Donovan, Joseph Patrick. Pelagius and the Fifth Crusade. University of Pennsylvania Press, 1950.

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