5Martin, J. R. Beyond exchange: APPRAISAL Systems in English, in S. Hunston and G. Thompson (eds.) Evaluation in Text: authorial stance and the construction of discourse[M]. Oxford: Oxford University Press, 2000.
6Martin, J. R. and D. Rose. Working with Discourse: Meaning Beyond the Clause[M]. London: Longman, 2003.
7Martin, J. R. and P. White. The Language of Evaluation:Appraisal in English[M]. New Yoi-k:Palgrave MacMillan,2005.
8Halliday, M.A.K. An Introduction to Functional Grammar[M]. Indon: Edward Arnold, 1994.