7[2]LADO R.Linguistics Across Cultures[M].Ann Arbor,MI:University of Michigan Press,1957.
8[3]CORDER S P.A role for the mother tongue[M]//In GASS,S.and SELINKER,L.(eds.).Language Transfer in Language Learning.Rowley,MA:Newbury House,1983:85-97.
9[4]SHARWOOD SMITH M,KELLERMAN E.Crosslinguistic influence in second language acquisition:an introduction[M]//In KELLER MAN,E.and SHARW OOD SMITH,M.(eds.).Crosslinguistic Influence in Second Language Acquisition.New York:Pergamon Institute of English,1986:1-9.
10[5]KELLERMAN E.Transfer and non-transfer:where we are now[J].Studies in Second Language Acquisition,1979 (2):37-57.