CRYSTAL, D. (2003). English as a global language.-- ed.2. Cambridge University Press.
Dyfyniad Arddull ChicagoCRYSTAL, David. English as a Global Language.-- Ed.2. Cambridge: Cambridge University Press, 2003.
Dyfyniad MLACRYSTAL, David. English as a Global Language.-- Ed.2. Cambridge University Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.