Alexander, R. J. (1981). The right opposition: The Lovestoneites and the International Communist Opposition of the 1930's. Greenwood Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAlexander, Robert J. The Right Opposition: The Lovestoneites and the International Communist Opposition of the 1930's. Greenwood Press, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAlexander, Robert J. The Right Opposition: The Lovestoneites and the International Communist Opposition of the 1930's. Greenwood Press, 1981.
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