2Pinker, S. 1995. The Language Instinct. New York: Harper Perenial.
3Sawhney, C. and P. K. Agnihoti. 1998. Acquisition of Hindi as a second language by Tamils in Deli: a social psychological perspective. In Agnihotri, R. K. , A. L. Khanna and I. Sachdev, eds. , 119 -29. Social Psychological Properties on Second Language Learning. New Delhi, etc. : SAGE Publication.
4Schumann, J. H. 1978. The acculturation model for second language acquisition. In Gingras, R. C. , ed. , 27 -50. Second Language Acquisition and Foreign Language Teaching. Arlington, VA: Center for Applied Linguistics.
5Terence, O. 1989. Language Transfer. Cambridge: Cambridge University Press.
6Weber-Fox, C. M. and H. J. Neville. 1999. Functional neural subsystems are differentially affected by delays in second language immersion: ERP and behavioral evidence in bilinguals. In Birdsong, D. , ed. , 23 - 64.
7Wolfson, N. 1989. Perspectives: Sociolinguistics and TESOL. Cambridge, New York, etc. : Newbury House Publishers.
10Bever, T. G. 1981. Normal acquisition processes explains the critical period for language learning. In Diner, K. C., ed., 176- 98. Individual Differences and Universals in Language Learning Aptitude. Rowley, London and Tokyo: Newbury House Publishers.
1PENF1ELD W, ROBERTS L. Speech and brain-mechanisms [M]. Princeton.NJ: Princeton University Press, 1959: 236.
2LAMENDELLA J. General principles of neurofunetion organi zation and their manifestations in primary and non-primary langu-age acquisition[J]. Language Learning, 1977 ( 27 ): 155-196.
3GENESEE F. Learning through two languages:studies of immersion and bilingual education[M]. Cambridge, MA: Newbury House, 1987: 61.
