Cotheal, Alexander I. 1848. "A Grammatical Sketch of the Language Spoken By the Indians of the Mosquito Shore." In Transactions of the American Ethnological Society, II: 235-264.

Costa, David J. 2003. "The Miami-Illinois Language." Lincoln: University of Nebraska Press.

Cook, Eung-Do. 1984. "A Sarcee Grammar." Vancouver: University of British Columbia Press.

Cook, William H. A Grammar of North Carolina Cherokee. PhD thesis, Yale University, 1979.

Conzemius, E. 1929. "Notes On the Miskito and Sumu Languages of Eastern Nicaragua and Honduras." In International Journal of American Linguistics, 5 , no. 5: 57-115.

Conzemius, Eduard. 1932. "Ethnographical Survey of the Miskito and Sumu Indians of Honduras and Nicaragua." 106: Smithsonian Institution, Washington:.

Collord, T. L. Yokuts Grammar: Chukchansi. PhD thesis, Berkeley: University of California, 1968.

Collins, W. M. Centeredness As a Cultural and Grammatical Theme in Maya-Mam. PhD thesis, Ohio State University, 2005.

Clark, Lawrence E. and Nancy D. Clark. 1960. "Popoluca-castellano, Castellano-popoluca." 4: 165. Instituto Lingüístico de Verano.

Clark, Lawrence E. 1961. "Sayula Popoluca Texts, with Grammatical Outline." 6: vii+216. Summer Institute of Linguistics of the University of Oklahoma.