(Αγγλικά) Setton, Kenneth, «Pope Leo X and the Turkish Peril» Proceedings, American Philosophical Society vol. 113, No. 6, 1969. Ανακτήθηκε 14/7/2018.
(Αγγλικά) Setton, Kenneth, «From Medieval to Modern Library». From Medieval to Modern Library, Proceedings of the American Philosophical Society, Vol. 104, No. 4 (Aug. 15, 1960), pp. 371-390, in 21 pdf pages. Ανακτήθηκε 14/7/2018.