Não informado. (1988). Historical Biology: An international journal of paleobiology. Harwood Academic Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Historical Biology: An International Journal of Paleobiology. Chur, Suíça: Harwood Academic Publishers, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Historical Biology: An International Journal of Paleobiology. Harwood Academic Publishers, 1988.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.