D'Augelli, A. R., & Danish, S. J. (1980). Helping skills: A basic training program (2nd ed.). Human Sciences Press.

D'Augelli, Anthony R., and Steven J. Danish. Helping Skills: A Basic Training Program. 2nd ed. New York: Human Sciences Press, 1980.

D'Augelli, Anthony R., and Steven J. Danish. Helping Skills: A Basic Training Program. 2nd ed. Human Sciences Press, 1980.