3Firth, J. R. , 1950,Study in Linguistic Analysis, London: Basil Blackwell.
4Halliday, M. A. K. ,1978, Language as Social Semiotic, The Social interpretation of Language and Meaning, London: Edward Arnold.
5Lakoff, G. , 1987, Women, Fire, and Dangerous Things, Chicago : University of Chicago Press.
6Leech,G. ,1981, Semantics, Penguin Books Ltd.
7Steinberg, D. D. , 1993, An Introduction to Psycholinguistics, London & New York: Longman Group UK Ltd.
8Violi, P. ,2000," Proto - typicality, typicality and context", in L. Albertazzi, Meaning and Cognition, Amsterdam/Philadelphia: John Benjamins Publishing Company.
