Lourdaux, W. (1976). The Concept of Heresy in the Middle Ages: (11th - 13th c.) ; proceedings of the international conference, Louvain, May 13 - 16, 1973. Proceedings of the ... international conference.
Chicago Style (17th ed.) CitationLourdaux, Willem. "The Concept of Heresy in the Middle Ages: (11th - 13th C.) ; Proceedings of the International Conference, Louvain, May 13 - 16, 1973." Proceedings of the ... International Conference 1976.
MLA (8th ed.) CitationLourdaux, Willem. "The Concept of Heresy in the Middle Ages: (11th - 13th C.) ; Proceedings of the International Conference, Louvain, May 13 - 16, 1973." Proceedings of the ... International Conference, 1976.
Warning: These citations may not always be 100% accurate.