Cita APA (7a ed.)

Lightbown, P. M., & Spada, N. (2000). How languages are learned (2nd ed.). Oxford University.

Cita Chicago Style (17a ed.)

Lightbown, Patsy M., y Nina Spada. How Languages Are Learned. 2nd ed. Oxford: Oxford University, 2000.

Cita MLA (9a ed.)

Lightbown, Patsy M., y Nina Spada. How Languages Are Learned. 2nd ed. Oxford University, 2000.