1 Ellis, R., "The study of second language acquisition" Oxford University Press 1994
2 Corder, S. P., "The significance of learners’ errors" 5 (5): 161-170, 1967
3 Chomsky, N., "Lectures on government and binding" Foris 1981
4 Saville-Troike, M., "Introducing second language acquisition" Cambridge University Press 2006
5 Selinker, L., "Interlanguage" 10 (10): 209-231, 1972
6 Mayer, M., "Frog on his own" Dial Books for Young Readers 1973
7 Ingram. D., "First language acquisition: Method, description, and explanation" Cambridge University Press 1989
8 Lee, In, "Development of English Copula Be in L2 Acquisition: A case study with a Korean child learner of English" 대한영어영문학회 34 (34): 299-319, 2008
9 Carmi, G., "A circle of friends" Star Bright Books, Inc. 2003
1 Ellis, R., "The study of second language acquisition" Oxford University Press 1994
2 Corder, S. P., "The significance of learners’ errors" 5 (5): 161-170, 1967
3 Chomsky, N., "Lectures on government and binding" Foris 1981
4 Saville-Troike, M., "Introducing second language acquisition" Cambridge University Press 2006
5 Selinker, L., "Interlanguage" 10 (10): 209-231, 1972
6 Mayer, M., "Frog on his own" Dial Books for Young Readers 1973
7 Ingram. D., "First language acquisition: Method, description, and explanation" Cambridge University Press 1989
8 Lee, In, "Development of English Copula Be in L2 Acquisition: A case study with a Korean child learner of English" 대한영어영문학회 34 (34): 299-319, 2008
9 Carmi, G., "A circle of friends" Star Bright Books, Inc. 2003