Não informado. Report of the State Zoologist. Geological and Natural History Survey of Minnesota.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Report of the State Zoologist. Minneapolis, Minn: Geological and Natural History Survey of Minnesota.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Report of the State Zoologist. Geological and Natural History Survey of Minnesota.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.