APA (7th ed.) Citation

Krey, A. C. (1921). The first crusade: The accounts of eye-witnesses and participants. Princeton university press; [etc., etc.].

Chicago Style (17th ed.) Citation

Krey, August C. The First Crusade: The Accounts of Eye-witnesses and Participants. Princeton: Princeton university press; [etc., etc.], 1921.

MLA (9th ed.) Citation

Krey, August C. The First Crusade: The Accounts of Eye-witnesses and Participants. Princeton university press; [etc., etc.], 1921.