APA (7th ed.) Zitazioa
Murphy, R. (1997). Essential grammar in use (2a. ed.). At the University Press.
Chicago Style (17th ed.) Zitazioa
Murphy, Raymond. Essential Grammar in Use. 2a. ed. Cambridge: At the University Press, 1997.
MLA (9th ed.) Zitazioa
Murphy, Raymond. Essential Grammar in Use. 2a. ed. At the University Press, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.