APA (7th ed.) Citation

University of York & Sennis, A. (2016). Cathars in question. Heresy and inquisition in the Middle Ages.

Chicago Style (17th ed.) Citation

University of York and Antonio Sennis. "Cathars in Question." Heresy and Inquisition in the Middle Ages 2016.

MLA (8th ed.) Citation

University of York and Antonio Sennis. "Cathars in Question." Heresy and Inquisition in the Middle Ages, 2016.

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