APA (7th ed.) Zitazioa

Telephone IP News. Worldwide Videotex.

Chicago Style (17th ed.) Zitazioa

Telephone IP News. Worldwide Videotex.

MLA (9th ed.) Zitazioa

Telephone IP News. Worldwide Videotex.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.