Lourdaux, W. (1983). The concept of heresy in the Middle Ages: (11th - 13th c.) ; proceedings Mediaevalia Lovaniensia / 1.
Citazione stile Chigago Style (17a edizione)Lourdaux, Willem. "The Concept of Heresy in the Middle Ages: (11th - 13th C.) ; Proceedings." Mediaevalia Lovaniensia / 1 1983.
Citatione MLA (8a ed.)Lourdaux, Willem. "The Concept of Heresy in the Middle Ages: (11th - 13th C.) ; Proceedings." Mediaevalia Lovaniensia / 1, 1983.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.