Não informado. (1839). Memoirs of the Geological Survey of the United Kingdon. Institute of Geological Sciences.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Memoirs of the Geological Survey of the United Kingdon. London: Institute of Geological Sciences, 1839.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Memoirs of the Geological Survey of the United Kingdon. Institute of Geological Sciences, 1839.
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