Morgenstierne, Georg. 1954. "The Waigali Language." In Norsk Tidsskrift for Sprogvidenskap, 17: 146-219.

Cromack, R. E. 1968. "Language Systems and Discourse Structure in Cashinawa."

Tozzer, Alfred M. 1921. "A Maya Grammar." Peabody Museum of American Archaeology and Ethnology.

Sapir, Edward and Victor Golla. 2001. "Hupa Texts, with Notes and Lexicon." In The Collected Works of Edward Sapir. Volume 14: Northwest California Linguistics, edited by Victor Golla and Sean O'neill. Mouton de Gruyter.

Robinson, Dow Frederick. 1966. "Aztec Studies II: Sierra Nahuat Word Structure." University of Oklahoma.

Powlison, Paul S. 1995. "Diccionario Yagua - Castellano." 35: Ministerio de Educación and Instituto Lingüı.

Nancy, LeClaire and George Cardinal. 1998. "Alberta Elders' Cree Dictionary - Alperta Ohci Kehtehayak Nehiyaw Otwestamâkewasinahikan." edited by Earle H. Waugh. The University of Alberta Press.

Robert M. W. Dixon. 1991. "Words of Our Country." University of Queensland Press.

Miner, Ken. 1975. "An English-Menominee and Menominee-English Word List." Wisconsin Native American Languages Project.

De Vegamian, Felix M. 1978. "Diccionario Ilustrado Yupa-Español, Español-Yupa." Formateca C.A.