Crystal, D. (1997). The Cambridge encyclopedia of language (2nd ed.). Cambridge University Press.
Chicago Style aipamenaCrystal, David. The Cambridge Encyclopedia of Language. 2nd ed. Cambridge ; New York: Cambridge University Press, 1997.
MLA aipamenaCrystal, David. The Cambridge Encyclopedia of Language. 2nd ed. Cambridge University Press, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.