Crystal, D. (1997). English as a global language. Cambridge, England: Cambridge University Press.
Chicago Style CitationCrystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.
Cita MLACrystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.