2Chomsky,N. (1986)Knowledge of Language:Its Nature,Origin and Use, New York
3Bloom, P. (1990)syntactic distinctions in child language. J.Child Lang. 17,343 - 355
4Johnson,J. and E. Newport (1989) Critical period effects in second language learning: The influence of maturational state on the acquisition of English as a second language. Cognitive Psychology 21,60 - 99.
5Krashen, S. D. (1982)Principles and Practice in Second Language Acquisition. Oxford: Pergamon
6J. Michael O' Malley Anna Uhi Chamot (1990) Learning Strategies in Second Language, cambridge University Press.
7Robert Keith Johnson Merrill Swain (1990)Immersion Education: International Perspectives Cambridge University Press
8Wada,J. A. R, Clarke, and A. Hamm, (1975). Cerbral hemispheric asymmetry in Humans, Arch, Neurol, 32,239 - 246
9DeFries,J.C. ,D.W. Fulker,and M.C. Labuda,(1987)Evidence for a genetic aetiology in reading Disability of twins,Nature 329,537 - 539
10Pennington, B. and S. Smith, ( 1988 ) Genetic influences on learning disabilities, An update, J. Consult. Chin. Psychol.56,817 - 823
