Crystal, D. (1995). The Cambridge encyclopedia of the English language. Cambridge University Press.
Dyfyniad Arddull ChicagoCrystal, David. The Cambridge Encyclopedia of the English Language. Cambridge [England] ; New York: Cambridge University Press, 1995.
Dyfyniad MLACrystal, David. The Cambridge Encyclopedia of the English Language. Cambridge University Press, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.