"Survey projects". The Survey of California and Other Indian Languages. Department of Linguistics, University of California, Berkeley. Retrieved November 29, 2011.
doi.org
Spence, Justin (January 2016). "Lexical Innovation and Variation in Hupa (Athabaskan)". International Journal of American Linguistics. 82 (1). U of Chicago P: 71–91. doi:10.1086/684424. S2CID146938496.
Spence, Justin (January 2016). "Lexical Innovation and Variation in Hupa (Athabaskan)". International Journal of American Linguistics. 82 (1). U of Chicago P: 71–91. doi:10.1086/684424. S2CID146938496.
tworiverstribune.com
Lara, Callie (August 2, 2011). "Opinion". Two Rivers Tribune. Archived from the original on March 4, 2016. Retrieved November 29, 2011.