8[1]Corder,S.P.The Significance of Learner's Errors[J].International Review of Applied Linguistics,1967,5 (4):167 ~ 170.Reprinted in S.P.Corder.Error Analysis and Interlanguage[M].Oxford:Oxford University Press,1981.
9[2]Ellis,R.Interlanguage Variability in Narrative Discourse:Style Shifting in the Use of the Past Tense[J].Studies in Second Language Acquisition,1987 (9):12 ~ 20.
10[3]Ellis,R.The Study of Second Language Acquisition[M].Oxford:Oxford University Press,1994.