APA Style

Callahan, K, L. (2010). Twelve Keys to an Effective Church (Strong, Healthy Congregations Living in the Grace of God) (Cet.10). San Francisco: Jossey-Bass.

MLA Style

Callahan, Kennon, L.. "Twelve Keys to an Effective Church (Strong, Healthy Congregations Living in the Grace of God)". Cet.10 San Francisco: Jossey-Bass, 2010. Text.