MLA

Augustinus, Aurelius, and Wilfrid Parsons. Letters. 4 : 165-203. 2nd. ed. Washington (D.C.): Catholic university press, 1977.

APA

Augustinus, A., & Parsons, W. (1977). Letters. 4 : 165-203. 2nd. ed. Washington (D.C.): Catholic university press.

Chicago

Augustinus, Aurelius Letters. 4 : 165-203. Edited by Wilfrid Parsons. 2nd. ed. Washington (D.C.): Catholic university press, 1977.