Hartman, W. J. (1987). Five audiences: Identifying groups in your church. Abingdon.
Lua i Stíl Chicago (17ú heag.)Hartman, Warren J. Five Audiences: Identifying Groups in Your Church. Nashville: Abingdon, 1987.
Lua MLA (9ú heag.)Hartman, Warren J. Five Audiences: Identifying Groups in Your Church. Abingdon, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.