APA aipamena

Crystal, D. (1997). English as a global language. Cambridge, England: Cambridge University Press.

Chicago Style aipamena

Crystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.

MLA aipamena

Crystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.