D'Augelli, A. R., & Danish, S. J. (1980). Helping skills: A basic training program (2nd ed.). Human Sciences Press.
Cita Chicago (17th ed.)D'Augelli, Anthony R., i Steven J. Danish. Helping Skills: A Basic Training Program. 2nd ed. New York: Human Sciences Press, 1980.
Cita MLA (8th ed.)D'Augelli, Anthony R., i Steven J. Danish. Helping Skills: A Basic Training Program. 2nd ed. Human Sciences Press, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.