5Scotton, C M. 1988. Code switching as indexical of social negotiations [ A]. In M Heller (ed.). Codeswitdzing : Anthropological and Sociolinguistic Perspectives [C]. Mouton de gruyter.
6Levinson, S. 1983. Pragmatics [M]. Cambridge. Cambridge University Press.
7Mitchell, R. 1985. Process research in second language classrooms [J]. Language Teaching 18:330-352.
8Moyer, M G. 1998. Bilingual Conversation of Codeswitching for Power Wielding [ A]. In P Auer ( ed. ). Code-switching in Conversation : Language, Interaction and Identity [C]. London and New York: Routledge.
9Peck, S. 1985. Signs of learning: Child nonnative speakers in tutoring sessions with a child native speaker[ R]. Department of English-ESL, University ofCalifornia, Los Angeles.
10Pennington, M C & J Balla. 1998. Our future English teachers: Language use among graduate and undergraduate TESL students in Hong Kong [ A]. In M C Pennington (ed.). Language in HongKong at Century's End [C]. Hong Kong: Hong Kong University Press.
