Macfarlane, R. (2019). Underland: A deep time journey (First American edition.). W.W. Norton & Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMacfarlane, Robert. Underland: A Deep Time Journey. First American edition. New York: W.W. Norton & Company, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMacfarlane, Robert. Underland: A Deep Time Journey. First American edition. W.W. Norton & Company, 2019.
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