来源： “North America” (1-96) . Victor Golla (2007) , C. Moseley · London & New York: Routledge

来源： “The World Atlas of Language Structures” . , Bernard Comrie and David Gil and Martin Haspelmath and Matthew S. Dryer · Oxford University Press

来源： “Ethnologue: Languages of the World, 16th Edition (2009)” . , M. Paul Lewis · SIL International

来源： “Ethnologue: Languages of the World, 19th Edition (2016)” . , Lewis, M. Paul, Gary F. Simons, and Charles D. Fennig · SIL International

来源： “Atlas of the World’s Languages in Danger” . Christopher Moseley (ed.) (2010) UNESCO Publishing

来源： “North America” (7-41) . Victor Golla and Ives Goddard and Lyle Campbell and Marianne Mithun and Mauricio Mixco (2008) , Chris Moseley and Ron Asher · Routledge

来源： “Alaska Native Languages: Population and Speaker Statistics” . Alaska Native Language Center (2014)

来源： “Endangered Languages of the United States” (108-130) . Christopher Rogers, Naomi Palosaari and Lyle Campbell (2010) , Christopher Moseley · UNESCO

来源： “World Oral Literature Project” .