"North, D. (1988). The heritage we defend: A contribution to the history of the fourth international. Labor publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"North, David". The Heritage We Defend: A Contribution to the History of the Fourth International. Labor publishers, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"North, David". The Heritage We Defend: A Contribution to the History of the Fourth International. Labor publishers, 1988.
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