APA aipamena

Widdowson, H. G. (2003). Linguistics. Oxford: Oxford University Press.

Chicago Style aipamena

Widdowson, H. G. Linguistics. Oxford: Oxford University Press, 2003.

MLA aipamena

Widdowson, H. G. Linguistics. Oxford: Oxford University Press, 2003.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.