Addison, James Thayer. The Christian Approach to the Moslem: A Historical Study. New York: Columbia University Press, 1942, 365 p.

Discusses Christian missionary encounter with Islam beginning in the seventh century, with particular emphasis on the social and political atmosphere of these interactions.

Backus, Irena. "John of Damascus, De Fide Orthodoxa: Translations by Burgundio (1153/54), Grosseteste (1235/40) and Lefevre d'Etaples (1507)." Journal of the Warburg and Courtauld Institutes 49 (1986): 211-17.

Compares three Latin translations of De fide Orthodoxa, the third part of the Sources of Knowledge.