APA (7th ed.) Citation

Lightbown, P., & Spada, N. M. (2006). How languages are learned (3rd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Lightbown, Patsy, and Nina Margaret Spada. How Languages Are Learned. 3rd ed. Oxford [etc.]: Oxford University Press, 2006.

MLA (9th ed.) Citation

Lightbown, Patsy, and Nina Margaret Spada. How Languages Are Learned. 3rd ed. Oxford University Press, 2006.