1981Variation Theory and Second Language Acquisition. In D. Sankoff and H. Cedergren (eds.), Variation Omnibus. Carbondale, Ill.: Linguistic Research Inc., 215–225.
Bickerton, Derek
1981Roots of Language. Ann Arbor, Mich.: Karoma Publishers.
Brown, Roger
1973A First Language: The Early Stages. Cambridge, Mass.: Harvard University Press.
Chomsky, Noam
1965Aspects of the Theory of Syntax. Cambridge, Mass.: MIT Press.
Dulay, Heidi, and Marina Burt
1974Natural Sequences in Child Second Language Acquisition. Language Learning 241: 37–53.
Krashen, Stephen
1981Second Language Acquisition and Second Language Learning. Oxford: Pergamon Press.
Labov, William
1969Contraction, Deletion, and Inherent Variability of the English Copula. Language 451: 715–762.
Labov, William
1972Sociolinguistic Patterns. Philadelphia: University of Pennsylvania Press.
Lakoff, George
1987Women, Fire, and Dangerous Things: What Categories Reveal about the Mind. Chicago: University of Chicago Press.
Rosch, Eleanor
1973On the Internal Structure of Perceptual and Semantic Categories. In T. E. Moore (ed.), Cognitive Development and the Acquisition of Language. New York: Academic Press, 111–144.
Schumann, John
1978The Pidginization Process. Rowley, Mass.: Newbury House Publishers.
Tarone, Elaine
1979Interlanguage as Chameleon. Language Learning 291: 181–191.
Wolfram, Walt
1969A Sociolinguistic Description of Detroit Negro Speech. Washington, D.C.: Center for Applied Linguistics.
Wolfram, Walt, and Ralph Fasold
1974The Study of Social Dialects in American English. Englewood Cliffs, N.J.: Prentice-Hall.