Crystal, D. (2003). The Cambridge encyclopedia of the English language (2nd ed.). Cambridge: Cambridge University Press.
Chicago Style aipamenaCrystal, David. The Cambridge Encyclopedia of the English Language. 2nd ed. Cambridge: Cambridge University Press, 2003.
MLA aipamenaCrystal, David. The Cambridge Encyclopedia of the English Language. 2nd ed. Cambridge: Cambridge University Press, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.