Krashen, S. D. (1981). Second language acquisition and second language learning. Pergamon Press.
Chicago-čujuhus (17. p.)Krashen, Stephen D. Second Language Acquisition and Second Language Learning. Oxford: Pergamon Press, 1981.
MLA-čujuhus (9. p.)Krashen, Stephen D. Second Language Acquisition and Second Language Learning. Pergamon Press, 1981.
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