Não informado. (2020). Memoirs of the Geological Survey of Great Britain. Her Majesty's Stationery Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Memoirs of the Geological Survey of Great Britain. London: Her Majesty's Stationery Office, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Memoirs of the Geological Survey of Great Britain. Her Majesty's Stationery Office, 2020.
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