1. Baugh,John1983Black Street Speech: Its History, Structure, and Survival. Austin: University of Texas Press.
2. Blom, Jan P, and Gumperz, John1972Social Meaning and Linguistic Structure: Code-switching in Norway. In Directions in Sociolinguistics. John Gumperz and Dell Hymes, eds. Pp. 407-434. New York: Holt, Rinehart, and Winston.
3. Variable Rules: Performance as a Statistical Reflection of Competence
4. Gumperz, John, and Hernandez-Chavez, E.1971Bilinguals, Bidialectalism, and Classroom Interaction. In. (1997) English with an accent. J. Lippi-Green, R., ed. London: Routledge.