APA (7th ed.) Zitazioa
WetFeet (Firm). (2002). WetFeet insider guide: Careers in oil and gas. WetFeet.
Chicago Style (17th ed.) Zitazioa
WetFeet (Firm). WetFeet Insider Guide: Careers in Oil and Gas. San Francisco, California: WetFeet, 2002.
MLA (9th ed.) Zitazioa
WetFeet (Firm). WetFeet Insider Guide: Careers in Oil and Gas. WetFeet, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.