1. Becenti, A. R. (1999). Diné Bizaad Bóhoo'aah I: A conversational Navajo text for secondary schools, colleges, and adults. Navajo Preparatory School.
2. Diné Bizaad[Navajo Language] at a Crossroads: Extinction or Renewal?
3. Best, J. , & Dunlap, A. (2012). Native-language education: Addressing the interests of special populations within U.S. federal policy. Mid-Continent Research for Education and Learning. https://files.eric.ed.gov/fulltext/ED544597.pdf
4. City-Data. (2008 March). Language data.
http://www.city-data.com
5. Department of Information Technology. (2011). Welcome to the Navajo Nation government: Official site of the Navajo Nation. https://www.navajo-nsn.gov/history.htm