Não informado. (1970). Socialist revolution. Center for Social Research and Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Socialist Revolution. San Francisco, Calif: Center for Social Research and Education, 1970.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Socialist Revolution. Center for Social Research and Education, 1970.
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