Citazione Stile APA (7a Edizione)

Crystal, D. (1997). English as a global language (1a. ed.). Cambridge University Press.

Citazione stile Chigago Style (17a edizione)

Crystal, David. English as a Global Language. 1a. ed. Cambridge: Cambridge University Press, 1997.

Citatione MLA (9a ed.)

Crystal, David. English as a Global Language. 1a. ed. Cambridge University Press, 1997.