Hartman, W. J. (1987). Five audiences: Identifying groups in your church. Abingdon.
Cita Chicago (17th ed.)Hartman, Warren J. Five Audiences: Identifying Groups in Your Church. Nashville: Abingdon, 1987.
Cita MLA (9th ed.)Hartman, Warren J. Five Audiences: Identifying Groups in Your Church. Abingdon, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.