Carkhuff, R. R. (1969). Helping and human relations: A primer for lay and professional helpers. Holt, Rinehart and Winston.
Citace podle Chicago (17th ed.)Carkhuff, Robert R. Helping and Human Relations: A Primer for Lay and Professional Helpers. New York: Holt, Rinehart and Winston, 1969.
Citace podle MLA (8th ed.)Carkhuff, Robert R. Helping and Human Relations: A Primer for Lay and Professional Helpers. Holt, Rinehart and Winston, 1969.
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