Não informado. (1981). Bulletin of the Central Geological Survey. Ministry of Economic Affairs, Central Geological Survey.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Central Geological Survey. Taipei: Ministry of Economic Affairs, Central Geological Survey, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Central Geological Survey. Ministry of Economic Affairs, Central Geological Survey, 1981.
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