1Swain, M. Three Functions of Output in Second Language Learning. In G. Cook& B. Seidlhofer (eds,.). Principles and Practice in Applied Linguistics. Oxford: Oxford University Press, 1995.
2Williams, M. , R, L. Burden. Psychology for Language Teachers. Cambridge: Cambridge University Press, 1997.
3[1]Brown, H. Douglas. Teaching by Principles: An Interactive Approach to Language Pedagogy [M ]. Beijing: Foreign Language Teaching and Research Press, 2003.
4[2]Hadley, Alice Omaggio. Teaching Language in Context (3rd edition)[M]. Boston: Heinle & Heinle Publishers, 2001.
5[3]Harmer, Jeremy. The Practice of English Language Teaching (3rd edition)[M]. Pearson Education Limited, 2003.
6[4]Johnson, Keith. An Introduction to Foreign Language Learning and Teaching [M]. Beijing: Foreign Language Teaching and Research Press, 2003.
