Clark, Eve V.1973. What's in a word? On the child's acquisition in his first language. In Cognitive development and the acquisition of language. T. E. Moore, Ed. New York, Academic Press.
2.
Clark, Eve V.1977. First language acquisition. In Psycholinguistics series: developmental and pathological. J. Morton and J. Marshall, Eds. London, Paul Elek Ltd.
3.
Leap, William.1974. On grammaticality in Native American English: the evidence from Isleta. International Journal of the Sociology of Language. 2, 79-89.
4.
Lenneberg, Eric.1967. Biological foundations of language. New York, John Wiley and Sons, Inc.
5.
Penfield, Susan D.1976. Some examples of Southwestern Indian English compared. In Studies in Southwestern Indian English, W. Leap, Ed. San Antonio, Trinity University.
6.
Selinker, Larry.1972. Interlanguage . International Review of Applied Linguistics. 3, 209-231.
7.
Stout, Steven.1976. A comment on selective control in English expression at Santa Ana. In Studies in Southwestern Indian English, W. Leap, Ed. San Antonio, Trinity University.
