1Dulay H.C, Burt,M.K.and Krashen,S.Language TWO[M].New York:Oxford University Press,1982.
2Gardner, R. C. & Lambert, W.E. Attitudes and Motivation in Second Language Learning[C].Rowley Mass.:Newbury House,1972.
3Gardner, R., Moorecroft, R. & Maclntyre, P.The Role of Anxiety in Second Language Performance of Language Dropouts[C].London:University of Western Ontario,1987.
4Horwits, E&Young, D.Language Anxiety From Theory and Kesearch to Classroom Implications[C].New Jersey:Prentice-Hall,1991.
5Krashen, S.Second Language Acquisiton and Second Language Learning[M].Oxford:Pergamon, 1981.
