^ abMcKay-Cody, Melanie Raylene (1998), “Plains Indian Sign Language: A comparative study of alternative and primary signers”, in Carroll, Cathryn, Deaf Studies V: Toward 2000--Unity and Diversity, Washington DC: Gallaudet University Press, ISBN1893891097
^Tomkins, William. Indian sign language. [Republication of "Universal Indian Sign Language of the Plains Indians of North America" 5th ed. 1931]. New York : Dover Publications 1969. (p. 7)
^Davis, Jeffrey. 2006. "A historical linguistic account of sign language among North American Indian groups." In Multilingualism and Sign Languages: From the Great Plains to Australia; Sociolinguistics of the Deaf community, C. Lucas (ed.), Vol. 12, pp. 3–35. Washington, DC: Gallaudet University Press
^ abDavis, Jeffrey E. (2010), Hand talk: Sign language among American Indian nations, Cambridge UK: Cambridge University Press, ISBN978-0-521-69030-0
^Supalla, Samuel J. (1992). The Book of Name Signs. p. 22
^Davis, Jeffrey、Supalla, Samuel 著「A Sociolinguistic Description of Sign Language Use in a Navajo Family」、Ceil, Lucas 編『Sociolinguistics in Deaf Communities』Gallaudet University Press、1995年、77–106頁。ISBN978-1-563-68036-6。
^“Language”. Blackfoot Crossing Historical Park. October 5, 2015閲覧。
^Wurtzburg, Susan, and Campbell, Lyle. "North American Indian Sign Language: Evidence for its Existence before European Contact," International Journal of American Linguistics, Vol. 61, No. 2 (Apr., 1995), pp. 153-167.