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Map redrawn and modified from two maps by cartographer Roberta Bloom appearing in Mithun (1999:xviii-xxi). Additional references include Mithun (1999:606-616), Goddard (1996) (contains a very nice color map), Sturtevant (1978-present), Campbell (1997:353-376).
Campbell, Lyle. (1997). American Indian languages: The historical linguistics of Native America. New York: Oxford University Press. ISBN0-19-509427-1.
Goddard, Ives (Ed.). (1996). Languages. Handbook of North American Indians (W. C. Sturtevant, General Ed.) (Vol. 17). Washington, D. C.: Smithsonian Institution. ISBN0-1604-8774-9.
Goddard, Ives. (1999). Native languages and language families of North America (rev. and enlarged ed. with additions and corrections). [Map]. Lincoln, NE: University of Nebraska Press (Smithsonian Institute). (Updated version of the map in Goddard 1996). ISBN0-8032-9271-6.
Mithun, Marianne. (1999). The languages of Native North America. Cambridge: Cambridge University Press. ISBN0-521-23228-7 (hbk); ISBN0-521-29875-X.
Sturtevant, William C. (Ed.). (1978-present). Handbook of North American Indians (Vol. 1-20). Washington, D. C.: Smithsonian Institution. (Vols. 1-3, 16, 18-20 not yet published).