APA (7th ed.) Citation

Geisler, N. L., & Hoffman, P. K. (2006). Why I am a Christian: Leading thinkers explain why they believe (Rev. and expanded ed.). Baker Books.

Chicago Style (17th ed.) Citation

Geisler, Norman L., and Paul K. Hoffman. Why I Am a Christian: Leading Thinkers Explain Why They Believe. Rev. and expanded ed. Grand Rapids, Mich: Baker Books, 2006.

MLA (8th ed.) Citation

Geisler, Norman L., and Paul K. Hoffman. Why I Am a Christian: Leading Thinkers Explain Why They Believe. Rev. and expanded ed. Baker Books, 2006.

Warning: These citations may not always be 100% accurate.