(1971). Encyclopedia of social work (ed.). NASW.
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Dyfyniad Arddull Chicago
Encyclopedia of Social Work. ed. New York: NASW, 1971.
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Dyfyniad MLA
Encyclopedia of Social Work. ed. NASW, 1971.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.