Campbell, Lyle; Kaufman, Terrence; Smith-Stark, Thomas C. (1986), "Meso-America as a Linguistic Area", Language, 62 (3): 530–570, doi:10.2307/415477, JSTOR415477.
Campbell, Lyle; Kaufman, Terrence; Smith-Stark, Thomas C. (1986), "Meso-America as a Linguistic Area", Language, 62 (3): 530–570, doi:10.2307/415477, JSTOR415477.