Welky, D. (2017). A wretched and precarious situation: In search of the last Arctic frontier (First edition.). W.W. Norton & Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWelky, David. A Wretched and Precarious Situation: In Search of the Last Arctic Frontier. First edition. New York: W.W. Norton & Company, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWelky, David. A Wretched and Precarious Situation: In Search of the Last Arctic Frontier. First edition. W.W. Norton & Company, 2017.
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