Não informado. (1956). Social Work. National Association of Social Workers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Social Work. Silver Spring, Md: National Association of Social Workers, 1956.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Social Work. National Association of Social Workers, 1956.
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