Corey, M. S., & Corey, G. (1988). Becoming a helper. Brooks/Cole.
Lua i Stíl Chicago (17ú heag.)Corey, Marianne Schneider, agus Gerald Corey. Becoming a Helper. California: Brooks/Cole, 1988.
Lua MLA (9ú heag.)Corey, Marianne Schneider, agus Gerald Corey. Becoming a Helper. Brooks/Cole, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.