Não informado. (2002). Bulletin of the Geological and Natural History Survey of the Chicago Academy of Sciences. Chicago Academy of Sciences.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Geological and Natural History Survey of the Chicago Academy of Sciences. Chicago, Ill: Chicago Academy of Sciences, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Geological and Natural History Survey of the Chicago Academy of Sciences. Chicago Academy of Sciences, 2002.
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