Cita APA (7th ed.)

Crystal, D. (2003). English as a global language (2nd ed.). Cambridge University Press.

Cita Chicago (17th ed.)

Crystal, David. English as a Global Language. 2nd ed. New York ; New Delhi: Cambridge University Press, 2003.

Cita MLA (8th ed.)

Crystal, David. English as a Global Language. 2nd ed. Cambridge University Press, 2003.