APA (7th ed.) Zitazioa
Metal Bulletin Daily. Euromoney Institutional Investor PLC.
Chicago Style (17th ed.) Zitazioa
Metal Bulletin Daily. Euromoney Institutional Investor PLC.
MLA (9th ed.) Zitazioa
Metal Bulletin Daily. Euromoney Institutional Investor PLC.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.