Lightbown, P. M., & Spada, N. (1993). How languages are learned. Oxford University Press.
Chicago Style (17th ed.) CitationLightbown, Patsy M., and Nina Spada. How Languages Are Learned. Oxford: Oxford University Press, 1993.
MLA (9th ed.) CitationLightbown, Patsy M., and Nina Spada. How Languages Are Learned. Oxford University Press, 1993.