Lightbown, P. M., & Spada, N. (1999). How languages are learned (2nd ed.). Oxford University Press.
Čikaški stil citiranja (17. izdanje)Lightbown, Patsy M., i Nina Spada. How Languages Are Learned. 2nd ed. Oxford: Oxford University Press, 1999.
MLA način citiranja (9. izdanje)Lightbown, Patsy M., i Nina Spada. How Languages Are Learned. 2nd ed. Oxford University Press, 1999.
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