APA Edition Citation

Mayer, H. E., & John Gillingham. (1972). Crusades. Oxford University Press.

Chicago Edition Citation

Mayer, Hans Eberhard, and John Gillingham. Crusades. London: Oxford University Press, 1972.

MLA Edition Citation

Mayer, Hans Eberhard, and John Gillingham. Crusades. Oxford University Press, 1972.

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