Blakemore,D.(1992).
Understanding utterances:An introduction to pragmatics.Oxford:Blackwell.
Leech.G.N.(1983).
Principles of pragmatics. London:Longman.
Levinson.S.C.(1983)Pragmatics.Cambridge:Cambridge
University Press.
Yule,G.(1996).
Pragmatic.Oxford:Oxford University Press.
