Callahan, K. L. (1990). Effective church leadership: Building on the twelve keys. Harper & Row.
Chicago-стиль цитированияCallahan, Kennon L. Effective Church Leadership: Building on the Twelve Keys. San Francisco: Harper & Row, 1990.
MLA-цитированиеCallahan, Kennon L. Effective Church Leadership: Building on the Twelve Keys. Harper & Row, 1990.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.