Rist, R. (2011). Pope Gregory IX and the grant of indulgences for military campaigns in Europe in the 1230s: A study in papal rhetoric. Crusades, 10, 79-102.
Chicago Style (17th ed.) CitationRist, Rebecca. "Pope Gregory IX and the Grant of Indulgences for Military Campaigns in Europe in the 1230s: A Study in Papal Rhetoric." Crusades 10 (2011): 79-102.
MLA (8th ed.) CitationRist, Rebecca. "Pope Gregory IX and the Grant of Indulgences for Military Campaigns in Europe in the 1230s: A Study in Papal Rhetoric." Crusades, vol. 10, 2011, pp. 79-102.
Warning: These citations may not always be 100% accurate.