APA (7th ed.) Citation

Asbridge, T. S. (2004). The first crusade: A new history. Oxford University Press.

Chicago Style (17th ed.) Citation

Asbridge, Thomas S. The First Crusade: A New History. New York: Oxford University Press, 2004.

MLA (9th ed.) Citation

Asbridge, Thomas S. The First Crusade: A New History. Oxford University Press, 2004.