6Brown, H. D. M & Ms for language classroom: Another look at motivation [ A ]. In James E. A. (ed.). Georgetown University Round Table on Language and Linguistics [ C ]. Washington D. C: Georgetown University Press, 1990.
7Cohen, A. D. Strategies in Learning and Using a Second Language[M]. Beijing: Foreign Language Teaching and Research Press,.2000.
8Corder, S.P. Error Analysis and Interlanguage [ M ]. Oxford: Oxford University Press, 1981.
9Ellis, R. The Study of Second Language Acquisition [ M ]. Beijing: Foreign Language Teaching and Research Press, 1999.
10O' Malley,J, M. & Chamot, A.U. Learning Strategies in Second Language Acquisition [ M ]. Shanghai : Shanghai Foreign Language Education Press ,2001.
