"John, P. M. (1976). Marx on alienation: Elements of a critique of capitalism and communism. South Asian books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"John, Puthenpeedikail Mathew". Marx on Alienation: Elements of a Critique of Capitalism and Communism. South Asian books, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"John, Puthenpeedikail Mathew". Marx on Alienation: Elements of a Critique of Capitalism and Communism. South Asian books, 1976.
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