Howell, C. H. (2016). National Geographic pocket guide to the mammals of North America. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHowell, Catherine Herbert. National Geographic Pocket Guide to the Mammals of North America. Washington, D. C.: National Geographic, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHowell, Catherine Herbert. National Geographic Pocket Guide to the Mammals of North America. National Geographic, 2016.
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