1Carver, D. Some propositions about ESP[J]. The ESPJournal, 1983, (2): 131 - 137.
2Cunmins, J. Cognitive/academic language proficiency, linguistic interdependence, the optimum age question and some other matters [J]. Working Papers on Bilingualism, 1979, (19): 121 - 129.
3Dudley-Evans, T. & St. John, M. Developments in ESP: A multi-dis ciplinaryapproach[M]. Cambridge: Cambridge University Press, 1998.
4Hutchinson, T. & Waters, A. English for Specific Purpose : A leaming centered approach[M]. Cambridge: Cambridge University Press, 1987.
5Jones, G. ESP textbooks: Do they really exist? [ J]. English for Specif ic Purpose, 1990, (9): 89 - 93.
6Strevens, P. ESP after twenty years: A re-appraisal. In M. Tickoo (ed.). ESP: State of the Art (pp. 1-13). Singapore: SEAMEO re-gional Center, 1988.