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

来源： “South America” (103-196) . Mily Crevels (2007) , C. Moseley · London & New York: Routledge

来源： “Ethnologue: Languages of the World, 17th Edition (2013)” . , Paul M. Lewis; Gary F. Simons; and Charles D. Fennig · Dallas, Texas: SIL International

来源： “World Oral Literature Project” .

来源： “Language endangerment in South America: The clock is ticking” (167-234) . Crevels, Mily (2012) , Lyle Campbell and Veronica Grondona · Mouton de Gruyter