Socialist Union. (1956). Twentieth century socialism: The economy of tomorrow. Penguin books publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSocialist Union. Twentieth Century Socialism: The Economy of Tomorrow. Penguin books publishers, 1956.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSocialist Union. Twentieth Century Socialism: The Economy of Tomorrow. Penguin books publishers, 1956.
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