Gaya APA

Lightbown, P, M., Spada, N. (2006). How Languages are Learned : Patsy M Lightbown, Nina Spada (Cet.3). New York: Oxford University press.

Gaya MLA

Lightbown, Patsy, M., Spada, Nina.. "How Languages are Learned : Patsy M Lightbown, Nina Spada". Cet.3 New York: Oxford University press, 2006. Buku.