Lightbown, P. M., & Spada, N. (2006). How languages are learned (3rd ed.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Lightbown, Patsy M., agus Nina Spada. How Languages Are Learned. 3rd ed. Oxford: Oxford University Press, 2006.
Lua MLA (8ú heag.)Lightbown, Patsy M., agus Nina Spada. How Languages Are Learned. 3rd ed. Oxford University Press, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.