Citazione Stile APA (7a Edizione)

Richards, J. C., & Nunan, D. (1990). Second language teacher education (1a. ed.). Cambridge University.

Citazione stile Chigago Style (17a edizione)

Richards, Jack C., e David Nunan. Second Language Teacher Education. 1a. ed. Cambridge: Cambridge University, 1990.

Citatione MLA (9a ed.)

Richards, Jack C., e David Nunan. Second Language Teacher Education. 1a. ed. Cambridge University, 1990.