APA aipamena

Thornbury, S. (2004). Natural grammar. N.Y.: Oxford University Press.

Chicago Style aipamena

Thornbury, Scott. Natural Grammar. N.Y.: Oxford University Press, 2004.

MLA aipamena

Thornbury, Scott. Natural Grammar. N.Y.: Oxford University Press, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.