Citazione APA

Richards, J. C. (1997). Interchange: Englsh for international communication (23rd ed.). Cambridge University Press.

Stile di citazione Chicago

Richards, Jack C. Interchange: Englsh for International Communication. 23rd ed. New Delhi: Cambridge University Press, 1997.

Citazione MLA

Richards, Jack C. Interchange: Englsh for International Communication. 23rd ed. Cambridge University Press, 1997.