2Rod Ellis: Understanding Second Language Acquisition.(《第二语言习得概论》),上海:上海外语教育出版社,1999年,第127页.
3Keith Johnson & Helen Johnson 主编的 Encyclopedic Dictionary of Applied Linguistics: A Handbook for Language Teaching(《应用语言学百科词典:语言教学手册》),北京:外语教学与研究出版社.Blackwell Publishers Ltd.1998年,第173页.
4Rod Ellis : Understanding Second language Acquisition(《第二语言习得概论》),第127-129页.
5S. M. Gass: Input, Interaction, and the Second Language Learner, Lawrence Erlbaurn Associates, Inc., 1997.
6S. Krashen: The input hypothesis : Issues and implications, Longman, 1985.
7M. Long: Input and Second Language Acquisition Theory,见Input in Second Language Acquisition, Gass, S and C. Madded (eds.), Rowley, Mass:Newbury House, 1985.
8M. Swain: Communicative competence: some roles of comprehensible Input and Comprehensible Output in Its Development, 见, S. Gass and D. Madden (eds), Input in Second Language Acquisition. Rowley, MA: Newbury House, 1985年.
9R. Schmidt: Interaction, Acculturation and the Acquisition of Communicative Competence. 见 N. Wolfson and E. Judd (eds), Sociolinguistics and Sencond Language Acquisition. Rowley, MA: Newbury House, 1983年.
10N. S. Prabhu: Second Language Pedagogy. Oxford University Press, 1987.
