2Bigbell, J. Media Semiotics[M]. Manchester University Press, 1997.
3Brown, G & Yule, G. Discourse Analysis [ M ]. Cambridge University Press, 1993.
4Sperber, D & Wilson, D. Relevance: Communication and Cognition[ M]. Harvard University Press,1986.Sperber, D & Wilson, D. Relevance: Communication and Cognition (2nd ed. ). Blackwell Publishers Ltd, 1995