Lange, O. (1962). Problems of political economy of socialism. People's Pub. House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLange, Oskar. Problems of Political Economy of Socialism. People's Pub. House, 1962.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLange, Oskar. Problems of Political Economy of Socialism. People's Pub. House, 1962.
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