APA (7th ed.) Zitazioa
Kenny, N. First certificate: Practice tests (3a. ed.).
Chicago Style (17th ed.) Zitazioa
Kenny, N. First Certificate: Practice Tests. 3a. ed.
MLA (9th ed.) Zitazioa
Kenny, N. First Certificate: Practice Tests. 3a. ed.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.