APA (7th ed.) Zitazioa

Hobson, A. The Oxford Dictionary Dificult Words. Oxford University.

Chicago Style (17th ed.) Zitazioa

Hobson, Archie. The Oxford Dictionary Dificult Words. Oxford University.

MLA (9th ed.) Zitazioa

Hobson, Archie. The Oxford Dictionary Dificult Words. Oxford University.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.