ebrary, Inc, Granena, G., & Long, M. H. (2013). Sensitive periods, language aptitude, and ultimate L2 attainment. John Benjamins Publishing Company.
Chicago-viite (17. p.)ebrary, Inc, Gisela Granena, ja Michael H. Long. Sensitive Periods, Language Aptitude, and Ultimate L2 Attainment. Amsterdam: John Benjamins Publishing Company, 2013.
MLA-viite (9. p.)ebrary, Inc, et al. Sensitive Periods, Language Aptitude, and Ultimate L2 Attainment. John Benjamins Publishing Company, 2013.
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