2Susan Oyama.A sensitive period for the acquisition of a nonnative phonological system[J].Journal of Psycholinguistic Research.1976(3)
3Cazden,C.Second Language Acquisition Sequences in Children,Adolescents,and Adults[].Final report United States De-partment of HealthEducation and Welfare.1975
4.The Input Hypothesis[]..
5Leenneberg,E.Biological Foundations of Language[]..1976
6.Child-Adult Difference in Second Language Acquisition[]..1982
7Ellis R.The Study of Second Language Acquisition[]..1994
8Chastain,K.Affective and ability factors in second language acquisition[].Language Learning.1975
9Fromkin,V.,Krashen,S.,Curtiss,S.,Rigler,D.,Rigler,M.The development of language in Genie: A case of language acquisition beyond the “critical period.”[].Brain and Language.1974
10Oyama S.A sensitive period for the acquisition of non -native phonological system[].Journal of Psycholinguistic Research.1976
