APA (7th ed.) Citation

Lightbown, P. M., & Spada, N. M. (2013). How languages are learned (Fourth edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Lightbown, Patsy M., and Nina Margaret Spada. How Languages Are Learned. Fourth edition. Oxford: Oxford University Press, 2013.

MLA (8th ed.) Citation

Lightbown, Patsy M., and Nina Margaret Spada. How Languages Are Learned. Fourth edition. Oxford University Press, 2013.