BRILHART JOHN K. (2001). EFFECTIVE GROUP DISCUSSION. MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)BRILHART JOHN K. EFFECTIVE GROUP DISCUSSION. BOSTON: MCGRAW-HILL, 2001.
Lua MLA (9ú heag.)BRILHART JOHN K. EFFECTIVE GROUP DISCUSSION. MCGRAW-HILL, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.