APA (7th ed.) Citation

Tyerman, C. (2006). God's war: Anew history of the crusades. Penguine Group.

Chicago Style (17th ed.) Citation

Tyerman, Christopher. God's War: Anew History of the Crusades. London: Penguine Group, 2006.

MLA (9th ed.) Citation

Tyerman, Christopher. God's War: Anew History of the Crusades. Penguine Group, 2006.

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