MLA

Augustinus, Aurelius, and Vernon J Bourke. The Essential Augustine. New York (N.Y.): American library, 1964.

APA

Augustinus, A., & Bourke, V. J. (1964). The essential Augustine. New York (N.Y.): American library.

Chicago

Augustinus, Aurelius The Essential Augustine. Edited by Vernon J Bourke. New York (N.Y.): American library, 1964.