1Bogart, L. 1981. Press and Public: Who reads what, when,where and why in American newspapers [M]. Hillsdale,N.J.: Lawrence Erlbaum Associates Publishers.
2Brook, G.L. 1979. Varieties of English (2nd edition) [M].London: Macmillan Press Ltd.
3Crystal, D. & D. Davy. 1969. Investigating English Style[M]London: Longman.
4Halliday, M.A.K. 1985/1994. An Introduction to Functional Grammar [M]. London: Edward Arnold.
5Leech, G.N. & M.H. Short. 1981. Style in Fiction: A linguistic introduction to English fictional prose [M]. London: Longman.
6Newsom, D. & J. A. Wollert. 1985. Media Writing: News for the mass media [M]. Belmont, California: Wadsworth Publishing Company.
7Gregory, M. & S. Carroll. 1978. Language and Situation:Language Varieties and their Social Contexts. [M] London: Routledge & Kegan Paul Ltd.
8Halliday, M. A. K. 1978. Language as Social Semiotic: The Social Interpretation of Language and Meaning. [M] London: Edward Arnold.
9O'Donnell, W.R. & L. Todd. 1991. Variety in Contemporary English (2nd edition ) [M]. London: Harper Collins Academic.
10Rivers, W.L. et al. 1988. Writing Opinion: Editorials [M].Ames, Iowa: Iowa State University Press.
