Perkinson, R. R. (2008). Chemical dependency counseling: A practical guide (3d ed.). Sage Publications.
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Dyfyniad Arddull Chicago
Perkinson, Robert R. Chemical Dependency Counseling: A Practical Guide. 3d ed. Thousand Oaks, Calif.: Sage Publications, 2008.
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Dyfyniad MLA
Perkinson, Robert R. Chemical Dependency Counseling: A Practical Guide. 3d ed. Sage Publications, 2008.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.