9[2]Harley, B. 8M.Swain. The Interlanguage of Immersion Students and Its Implications for Second LanguageTeaching[A]. in Davies, A. C. Criper,A.P.R.Howatt(eds). Interlanguage[C]. Edinburgh: Edinburgh University Press, 1984. 309.
10[3]Cananle, M. & Swain. Theoretical Base of Communieation Approaches to Second Language Teaching and Testing[J]. Applied Linguistics, 1980,(1):15.
