Singer, E. (1970). Key concepts in psychotherapy (2nd ed.). Basic books.
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Dyfyniad Arddull Chicago
Singer, Erwin. Key Concepts in Psychotherapy. 2nd ed. New York: Basic books, 1970.
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Dyfyniad MLA
Singer, Erwin. Key Concepts in Psychotherapy. 2nd ed. Basic books, 1970.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.