Hartman, W. J. (1987). Five audiences: Identifying groups in your church. Abingdon.
Citazione stile Chigago Style (17a edizione)Hartman, Warren J. Five Audiences: Identifying Groups in Your Church. Nashville: Abingdon, 1987.
Citatione MLA (9a ed.)Hartman, Warren J. Five Audiences: Identifying Groups in Your Church. Abingdon, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.