Tolong jelaskan mengenai Sekunder dari Perang Salib Kedua

Gervers, Michael, ed. The Second Crusade and the Cistercians. St. Martin's Press, 1992.

Phillips, Jonathan, and Martin Hoch, eds. The Second Crusade: Scope and Consequences. Manchester University Press, 2001.

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

Villegas-Aristizábal, Lucas, "Anglo-Norman involvement in the conquest of Tortosa and Settlement of Tortosa, 1148–1180", Crusades, 8, Aldeshot, 2009, pp. 65–129.