Lua APA (7ú heag.)
Carkhuff, R. R. (2009). The art of helping (9th ed.). HRD Press.
Lua i Stíl Chicago (17ú heag.)
Carkhuff, Robert R. The Art of Helping. 9th ed. Amherst, Mass.: HRD Press, 2009.
Lua MLA (9ú heag.)
Carkhuff, Robert R. The Art of Helping. 9th ed. HRD Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.