1[1]Chomsky,N.(1965) Aspects of the Theory of Syntax.Cambridge,Mass:MIT Press.
2[2]Dulay,H,and Burt,M.(1977) Remarks on creativeity in language acquisition.In Burt,M.,Dulay,H.and Finocchiaro,M.(1977) Viewpoints on English as a Second Language.New York:Regents publishing Company.Inc.
3[4]Dulay,H.,Burr,M.and Krashen,S.(1982) Language Two.New York:Oxford University Press.
4[5]Ellis,R.(1990) Instructed Second Language Acquisition.Oxford:Blaekwell Publishers.
5[6]Krashen,S.(1985) The Input Hypothesis.London:Longman.
6[7]Mclaughlin,B.(1987) Theories of Second-Language Learning.London:Edward Amold.
7[8]Swain,M.(1985) Communicative competence:some roles of comprehensible input and comprehensible output in its development.In Gass,S.and Madden,C.(eds).(1985) Input in Second Language Acquistion,Rowley,Mass:Newbury House.