Langs, R. (1999). Psychotherapy and science. SAGE Publications.
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Dyfyniad Arddull Chicago
Langs, Robert. Psychotherapy and Science. London ; Thousand Oaks, Calif.: SAGE Publications, 1999.
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Dyfyniad MLA
Langs, Robert. Psychotherapy and Science. SAGE Publications, 1999.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.