APA (7th ed.) Citation

Treece, H. (1964). The crusades. A mentor Book.

Chicago Style (17th ed.) Citation

Treece, Henry. The Crusades. A mentor Book, 1964.

MLA (8th ed.) Citation

Treece, Henry. The Crusades. A mentor Book, 1964.

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