Citazione APA

Shannon, A. C. (1949). The popes and heresy in the thirteenth century. Augustinian Press.

Stile di citazione Chicago

Shannon, Albert Clement. The Popes and Heresy in the Thirteenth Century. Villanova, Pa.: Augustinian Press, 1949.

Citazione MLA

Shannon, Albert Clement. The Popes and Heresy in the Thirteenth Century. Augustinian Press, 1949.