Não informado. (1970). Socialist revolution. Center for Social Research and Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Socialist Revolution. San Francisco, Calif: Center for Social Research and Education, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Socialist Revolution. Center for Social Research and Education, 1970.
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