APA (7th ed.) Citation

Hazard, H. W. (1977). A history of the crusades A history of the crusades.

Chicago Style (17th ed.) Citation

Hazard, Harry W. "A History of the Crusades." A History of the Crusades 1977.

MLA (8th ed.) Citation

Hazard, Harry W. "A History of the Crusades." A History of the Crusades, 1977.

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