APA Style

Worthington, L, E. (1989). Marriage Counseling: A Christian Approach to Counseling Couples (Ed. 17). Downers Grove: Intervarsity Press.

MLA Style

Worthington, L., Everett. "Marriage Counseling: A Christian Approach to Counseling Couples". Ed. 17 Downers Grove: Intervarsity Press, 1989. Text.