The history of the Albigensian crusade.

MLA

Petrus Vallis Cernaii, and W. A Sibly. The History of the Albigensian Crusade. Woodbridge: Boydell, 1998.

APA

Petrus Vallis Cernaii, P. Vallis Cernaii, & Sibly, W. A. (1998). The history of the Albigensian crusade. Woodbridge: Boydell.

Chicago

Petrus Vallis Cernaii. The History of the Albigensian Crusade. Translated by W. A Sibly. Woodbridge: Boydell, 1998.