O'Shea, S. (2000). The perfect heresy: The revolutionary life and death of the medieval Cathars. Walker & Co.
Chicago Style (17th ed.) CitationO'Shea, Stephen. The Perfect Heresy: The Revolutionary Life and Death of the Medieval Cathars. New York: Walker & Co, 2000.
MLA (9th ed.) CitationO'Shea, Stephen. The Perfect Heresy: The Revolutionary Life and Death of the Medieval Cathars. Walker & Co, 2000.
Warning: These citations may not always be 100% accurate.