APA (7th ed.) Citation

Rubenstein, J. (2011). Armies of heaven: The first crusade and the quest for apocalypse. Basic Books.

Chicago Style (17th ed.) Citation

Rubenstein, Jay. Armies of Heaven: The First Crusade and the Quest for Apocalypse. New York: Basic Books, 2011.

MLA (9th ed.) Citation

Rubenstein, Jay. Armies of Heaven: The First Crusade and the Quest for Apocalypse. Basic Books, 2011.