APA-referens (7:e uppl.)

Augustine, S., & Parsons, W. (1981). Letters (3rd print.). Catholic University of America Press.

Chicago-referens (17:e uppl.)

Augustine, Saint, och Wilfrid Parsons. Letters. 3rd print. Washington, D.C.: Catholic University of America Press, 1981.

MLA-referens (9:e uppl.)

Augustine, Saint, och Wilfrid Parsons. Letters. 3rd print. Catholic University of America Press, 1981.