Harrison, K. D. (2010). The last speakers: The quest to save the world's most endangered languages. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHarrison, K. David. The Last Speakers: The Quest to Save the World's Most Endangered Languages. Washington, D.C.: National Geographic, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHarrison, K. David. The Last Speakers: The Quest to Save the World's Most Endangered Languages. National Geographic, 2010.
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