Cita APA

Lightbown, P. M. (1999). How languages are learned (2nd ed.). Oxford: Oxford University Press.

Chicago Style Citation

Lightbown, Patsy M. How Languages Are Learned. 2nd ed. Oxford: Oxford University Press, 1999.

Cita MLA

Lightbown, Patsy M. How Languages Are Learned. 2nd ed. Oxford: Oxford University Press, 1999.