APA (7th ed.) Zitazioa
Road & Rail Industry Profile: South Africa. Marketline.
Chicago Style (17th ed.) Zitazioa
Road & Rail Industry Profile: South Africa. Marketline.
MLA (9th ed.) Zitazioa
Road & Rail Industry Profile: South Africa. Marketline.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.