D'Augelli, A. R., & Danish, S. J. (1980). Helping skills: A basic training program (2nd ed.). Human Sciences Press.
Lua i Stíl Chicago (17ú heag.)D'Augelli, Anthony R., agus Steven J. Danish. Helping Skills: A Basic Training Program. 2nd ed. New York: Human Sciences Press, 1980.
Lua MLA (8ú heag.)D'Augelli, Anthony R., agus Steven J. Danish. Helping Skills: A Basic Training Program. 2nd ed. Human Sciences Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.