Cita APA (7th ed.)
Ambrose, S., & Beyenka, M. M. (2001). Letters. Catholic University of America Press.
Cita Chicago (17th ed.)
Ambrose, Saint, i Mary Melchior Beyenka. Letters. Washington, D.C.: Catholic University of America Press, 2001.
Cita MLA (9th ed.)
Ambrose, Saint, i Mary Melchior Beyenka. Letters. Catholic University of America Press, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.