Tolong jelaskan mengenai Daftar pustaka dari Quantum praedecessores

Steven Runciman, A History of the Crusades, vol. II: The Kingdom of Jerusalem and the Frankish East, 1100-1187. Cambridge University Press, 1952.

Kenneth Setton, ed. A History of the Crusades, vol. I. University of Pennsylvania Press, 1958 (available online).