Danish, S. J., D'Augelli, A. R., & Hauer, A. L. (1980). Helping skills: A basic training program (2nd ed.). Human Sciences Press.
Lua i Stíl Chicago (17ú heag.)Danish, Steven J., Anthony R. D'Augelli, agus Allen L. Hauer. Helping Skills: A Basic Training Program. 2nd ed. New York: Human Sciences Press, 1980.
Lua MLA (8ú heag.)Danish, Steven J., et al. Helping Skills: A Basic Training Program. 2nd ed. Human Sciences Press, 1980.
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