Queller, D. E. (1977). The Fourth Crusade: The conquest of Constantinople, 1201-1204. Philadelphia: University of Pennsylvania Press.
Чикагска система за цитиранеQueller, Donald E. The Fourth Crusade: The Conquest of Constantinople, 1201-1204. Philadelphia: University of Pennsylvania Press, 1977.
MLA формат за цитиранеQueller, Donald E. The Fourth Crusade: The Conquest of Constantinople, 1201-1204. Philadelphia: University of Pennsylvania Press, 1977.
Внимание: Тези цитати може да не са 100% точни.