APA Citation

Oldenbourg, Z. 1. (1967). The crusades. New York: Ballantine Books.

Chicago Style Citation

Oldenbourg, Zoé,‏ 1916-2002. The Crusades. New York: Ballantine Books, 1967.

MLA Citation

Oldenbourg, Zoé,‏ 1916-2002. The Crusades. New York: Ballantine Books, 1967.

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