Crystal, D. (1997). English as a global language. Cambridge, England: Cambridge University Press.
Čikaški stil citiranjaCrystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.
MLA način citiranjaCrystal, David. English As a Global Language. Cambridge, England: Cambridge University Press, 1997.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.