1[1]Gardner,R.& W.Lambert.Attitudes and Motivation in Second Language Acquisition[M].Rowley,Mass.Newbury House,1972.
2[2]Krashen,S.Pronciples and Practice in Second Language Acquisition[M].Oxford:Pergamon,1982.
3[3]Krashen,S.The Input Hypothesis:Issues and Implications[M].London:Longman,1985.
4[4]Lado,R.Linguistics Across Cultures[M].Michigan:University of Michigan Press,1957.
5[5]Swain,M.Communicative Competence:Some Roles of Comprehensible Input in its Development[M]//GASS,S,MADDEN C (eds.) Input in Second Language Acqusition.Rowley,Mass.Newbury House Publishers Inc,1985.
2Gardner R C & Maclntye P D. A student's contributions to second language learning: Part 1, 2[J]. Language Teaching, 1992, 25, 1993, 26.1993
3Hutchinson T, Waters A. English for Specific Purposes [M]. London: CUP, 1989.
4Stern H. Fundamental Concepts of Language Teaching [M]. Oxford: OUP, 1983.
5Spolysky B. Conditions for Second Language Learning [M]. Oxford: OUP, 1989.
6Swain M. Communicative competence: some roles of comprehensible input and comprehensible output in its development [A]. Gass S, Madden C.( eds.) Input in Second Language Acquisition[C]. Rowley, Mass. : Newbury House, Publishers Inc. 1985.