APA (7th ed.) Citation

Pegg, M. G. (2008). A most holy war: The Albigensian crusade and the battle for Christendom. Oxford University Press.

Chicago Style (17th ed.) Citation

Pegg, Mark Gregory. A Most Holy War: The Albigensian Crusade and the Battle for Christendom. Oxford [u.a.]: Oxford University Press, 2008.

MLA (8th ed.) Citation

Pegg, Mark Gregory. A Most Holy War: The Albigensian Crusade and the Battle for Christendom. Oxford University Press, 2008.