6Hymes DH. On communicative Competence [ A]. In The communicative approach to Language Teaching [ C ] :ed.C.J. Brumfit and K. Johnson. Oxford: Oxford University Press, 1979.5 - 26.
7Canale M & Swain. Theoretical bases of communicative approaches to second langauge teaching and testing [ J ].Applied Linguistics, 1980.1/1.
8Halliday MAK & Hasan R. Language, context and text [ M ]. Oxford: Oxford University Press, 1989.