Tohutoro APA (7th ed.)
Carkhuff, R. R. (2009). The art of helping (9th ed.). HRD Press.
Tohutoru Kātū Chicago (17th ed.)
Carkhuff, Robert R. The Art of Helping. 9th ed. Amherst, Mass.: HRD Press, 2009.
Tohutoro MLA (9th ed.)
Carkhuff, Robert R. The Art of Helping. 9th ed. HRD Press, 2009.
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