APA (7th ed.) Zitazioa

American Clean Car. Crain Communications Inc. (MI).

Chicago Style (17th ed.) Zitazioa

American Clean Car. Crain Communications Inc. (MI).

MLA (9th ed.) Zitazioa

American Clean Car. Crain Communications Inc. (MI).

Kontuz: berrikusi erreferentzia hauek erabili aurretik.