Durenberger. When Republicans Were Progressive. Minnesota Historical Society Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDurenberger. When Republicans Were Progressive. Minnesota Historical Society Press.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDurenberger. When Republicans Were Progressive. Minnesota Historical Society Press.
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