Crystal, D. (1997). English as a global language. Cambridge, England: Cambridge University Press.
Style de citation ChicagoCrystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.
Style de citation MLACrystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.
Attention : ces citations peuvent ne pas être correctes à 100%.