Roberts, D. (2022). Into the great emptiness: Peril and survival on the Greenland ice cap (First edition.). W.W. Norton & Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoberts, David. Into the Great Emptiness: Peril and Survival on the Greenland Ice Cap. First edition. New York, N.Y.: W.W. Norton & Company, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoberts, David. Into the Great Emptiness: Peril and Survival on the Greenland Ice Cap. First edition. W.W. Norton & Company, 2022.
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