Não informado. (2018). Annual Report of the Illinois State Museum of Natural History. Illinois State Museum of Natural History.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Annual Report of the Illinois State Museum of Natural History. Springfield, Ill: Illinois State Museum of Natural History, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Annual Report of the Illinois State Museum of Natural History. Illinois State Museum of Natural History, 2018.
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