APA aipamena

Callahan, K. L. (1990). Effective church leadership: Building on the twelve keys. Harper & Row.

Chicago Style aipamena

Callahan, Kennon L. Effective Church Leadership: Building on the Twelve Keys. San Francisco: Harper & Row, 1990.

MLA aipamena

Callahan, Kennon L. Effective Church Leadership: Building on the Twelve Keys. Harper & Row, 1990.