Callahan, K. L. (1983). Twelve Keys to an Effective Church: Strategic Planning for Mission. Saint Joseph's University.
Lua i Stíl Chicago (17ú heag.)Callahan, Kennon L. Twelve Keys to an Effective Church: Strategic Planning for Mission. Saint Joseph's University, 1983.
Lua MLA (8ú heag.)Callahan, Kennon L. Twelve Keys to an Effective Church: Strategic Planning for Mission. Saint Joseph's University, 1983.
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