APA (7th ed.) Citation

Keller, T. J. (2008). The reason for God: Belief in an age of skepticism. Dutton.

Chicago Style (17th ed.) Citation

Keller, Timothy J. The Reason for God: Belief in an Age of Skepticism. New York: Dutton, 2008.

MLA (9th ed.) Citation

Keller, Timothy J. The Reason for God: Belief in an Age of Skepticism. Dutton, 2008.