Carkhuff, R. R. (2009). The art of helping (9th ed.). HRD Press.
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Tohutoru Kātū Chicago (17th ed.)
Carkhuff, Robert R. The Art of Helping. 9th ed. Amherst, Mass.: HRD Press, 2009.
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Tohutoro MLA (9th ed.)
Carkhuff, Robert R. The Art of Helping. 9th ed. HRD Press, 2009.
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Kua rahua te tārua ki te papatopenga
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