Não informado. (1978). Socialist review. Center for Social Research and Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Socialist Review. San Francisco, Calif: Center for Social Research and Education, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Socialist Review. Center for Social Research and Education, 1978.
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