Mason, J. Alden. 1923. "Preliminary Sketch of the Yaqui Language." 20: 195-214. Berkeley and Los Angeles: University of California Press.

Mason, J. Alden. 1916. "The Mutsun Dialect of Costanoan Based On the Vocabulary of De La Cuesta." In University of California Publications in American Archaeology and Ethnology, 11 , no. 7:

Marlett, Stephen A. 2005. "A Typological Overview of the Seri Language." In Linguistic Discovery, 3 , no. 1: 54-73.

Marlett, Stephen A. The Structure of Seri. PhD thesis, University of California at San Diego, 1981.

Maring, Joel M. Grammar of Acoma Keresan. PhD thesis, Indiana University, 1967.

Manaster-Ramer, Alexis. 1996. "Tonkawa and Zuni: Two Test Cases For the Greenberg Classification." In International Journal of American Linguistics, 62 , no. 3: 264-288.

Malotki, Ekkehardt. 1983. "Hopi Time: A Linguistic Analysis of the Temporal Concepts in the Hopi Language." 20: Mouton de Gruyter.

Malecot, Andre. 1963, 1963, 1964, 1964. "Luiseño, a Structural Analysis." In International Journal of American Linguistics, 29, 29, 30, 30 , no. 2, 3, 1, 3: 89-95, 196-210, 14-31, 243-250.

Maldonado, R. Z. 1992. "Acateco De La Frontera Sur." D. F.: El Colégio de México.

Macri, Martha J. A Descriptive Grammar of Palenque Mayan. PhD thesis, Berkeley: University of California, 1988.