Pontifex, M. (1955). St. Augustine, The Problem of Free Choice. Translated and annotated by Dom Mark Pontifex. [publisher not identified].
Citazione stile Chigago Style (17a edizione)Pontifex, Mark. St. Augustine, The Problem of Free Choice. Translated and Annotated by Dom Mark Pontifex. New York Mahwah, New Jersey: [publisher not identified], 1955.
Citatione MLA (8a ed.)Pontifex, Mark. St. Augustine, The Problem of Free Choice. Translated and Annotated by Dom Mark Pontifex. [publisher not identified], 1955.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.