Cita APA (7a ed.)

Lourdaux, W., & Verhelst, D. (1983). Concept of Heresy in the Middle Ages (11th-13th C.): Proceedings of the international conference Louvain, May 13-16, 1973. University Press.

Cita Chicago Style (17a ed.)

Lourdaux, W., y D. Verhelst. Concept of Heresy in the Middle Ages (11th-13th C.): Proceedings of the International Conference Louvain, May 13-16, 1973. Leuven: University Press, 1983.

Cita MLA (9a ed.)

Lourdaux, W., y D. Verhelst. Concept of Heresy in the Middle Ages (11th-13th C.): Proceedings of the International Conference Louvain, May 13-16, 1973. University Press, 1983.