Não informado. (1977). Social work research and abstracts. National Association of Social Workers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Social Work Research and Abstracts. New York: National Association of Social Workers, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Social Work Research and Abstracts. National Association of Social Workers, 1977.
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