Cita APA (7a ed.)

Lightbown , P. M., & Spada, N. (2000). How Languages are Learned (4th. ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Lightbown , Patsy M., y Nina Spada. How Languages Are Learned. 4th. ed. Oxford: Oxford University Press, 2000.

Cita MLA (8a ed.)

Lightbown , Patsy M., y Nina Spada. How Languages Are Learned. 4th. ed. Oxford University Press, 2000.