Callahan, K. L. (1990). Effective church leadership: Building on the twelve keys. Harper & Row.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCallahan, Kennon L. Effective Church Leadership: Building on the Twelve Keys. San Francisco: Harper & Row, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCallahan, Kennon L. Effective Church Leadership: Building on the Twelve Keys. Harper & Row, 1990.
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