3Biber, D. Spoken and Written Textual Dimensions in English: Resolving the Contradictory Findings[J]. Language, 1986, (62):384-414.
4Biber, D. Variation Across Speech and Writing [M]. Cambridge: Cambridge University Press, 1988.
5Biber, D., et al. Corpus Linguistics: Investigating Language Structure and Use[M]. Cambridge: Cambridge University Press, 1998.
6Biber, D., et al. Longrnan Grammar of Spoken and Written English [M]. London: Longman, 1999.
7Biber, D. University Language: A Corpus-Based Study of Spoken and Written Registers [M]. Amsterdam/Philadelphia: John Benjamins Publishing Company, 2006.
