Cita APA (7a ed.)

Ahern, B. M. (1971). The Problem of Evil. Routledge & Kegan Paul.

Cita Chicago Style (17a ed.)

Ahern, Barnabas M. The Problem of Evil. London: Routledge & Kegan Paul, 1971.

Cita MLA (9a ed.)

Ahern, Barnabas M. The Problem of Evil. Routledge & Kegan Paul, 1971.