APA (7th ed.) Citation

Ahern, M. B. (1971). The problem of evil. Routledge and K. Paul.

Chicago Style (17th ed.) Citation

Ahern, M. B. The Problem of Evil. London: Routledge and K. Paul, 1971.

MLA (9th ed.) Citation

Ahern, M. B. The Problem of Evil. Routledge and K. Paul, 1971.