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

FUENTE: “An Overview of Language Preservation at Ohi: yoʹ, the Seneca Allegany Territory.” . Borgia, Melissa E. (2010)

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

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

FUENTE: “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