Sturtevant, William C. (1978–2008). Handbook of the North American Indians. Smithsonian Institution. ISBN0160045770. OCLC13240086.
Young, Robert W.; Morgan, William (1980). The Navajo language : a grammar and colloquial dictionary (1st ed.). Albuquerque: University of New Mexico Press. ISBN0826305369. OCLC6597162.
Albert, Roy; Shaul, David Leedom (1985). A concise Hopi and English lexicon. Philadelphia: J. Benjamins. ISBN9027220158. OCLC777549431.