On christian belief.

MLA

Augustinus, Aurelius, Boniface Ramsey, and Michael Fiedrowicz. On Christian Belief. Hyde Park: New City Press, 2005.

APA

Augustinus, A., Ramsey, B., & Fiedrowicz, M. (2005). On christian belief. Hyde Park: New City Press.

Chicago

Augustinus, Aurelius, and Michael Fiedrowicz. On Christian Belief. Edited by Boniface Ramsey. Hyde Park: New City Press, 2005.