Burgos, Manuel. 1994. "The Witotos and the Rubber Boom: The silent genocide. A Study through the Chronicles of Explorers of the Amazon Basin." In The Amazonian Chronicles, edited by J. Meunier and A. M. Savarin. San Francisco: Mercury House.

Murdock, George Peter. 1936. "The Witoto Kinship System." American Anthropologist 38 (3):525-527.

Aboriginal Tribes of Australia

Gregory Anderson. 2016. Personal Communication on Tangkhul Naga. July 2.

First Peoples' Cultural Council (FPCC). 2014. Report on the status of B.C. First Nations Languages (2nd Edition). http://www.fpcc.ca/files/PDF/Language/FPCC-LanguageReport-141016-WEB.pdf

Switzler, Valeri and Erin Flynn Haynes. 2014. Warm Springs languages. Handbook of heritage, community, and Native American languages in the United States: Research, policy, and educational practice, ed. by Terrence G. Wiley, Joy Kreeft Peyton, Donna Christian, Sarah Catherine K. Moore, and Na Liu, 229-238. New York and London: Routledge and Center for Applied Linguistics.

Mithun, Marianne. 2016. Personal communication about Central Pomo.

Ko, Edwin, Elodie Paquette, Ethan Rimdzius, Elizabeth Grillo, and Catherine O’Connor. 2015. Template for Multi-layered Language Learning Resources. Paper presented at the 4th International Conference of Language Documentation and Conservation (ICLDC), Honolulu, Hawai'i.

Phoenix from the Ashes: Reconstructed Cornish in relation to Einar Haugen’s four-step model of language standardisation

Lakota Language Consortium. http://lakhota.org/.