Comfort, R. A. (1966). Revolutionary Hamburg: Labor politics in the early Weimar Republic. Stanford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रComfort, Richard A. Revolutionary Hamburg: Labor Politics in the Early Weimar Republic. Standford, Calif: Stanford University Press, 1966.
एमएलए (9वां संस्करण) प्रशस्ति पत्रComfort, Richard A. Revolutionary Hamburg: Labor Politics in the Early Weimar Republic. Stanford University Press, 1966.
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