APA (7th ed.) Zitazioa

Augustine, S., & Parsons, W. (2008). Letters. Catholic University of America Press.

Chicago Style (17th ed.) Zitazioa

Augustine, Saint, eta Wilfrid Parsons. Letters. Washington, D.C.: Catholic University of America Press, 2008.

MLA (9th ed.) Zitazioa

Augustine, Saint, eta Wilfrid Parsons. Letters. Catholic University of America Press, 2008.