APA (7th ed.) Zitazioa
(2010). Implementing congestion charges. OECD : ITF.
Chicago Style (17th ed.) Zitazioa
Implementing Congestion Charges. [Place of publication not identified]: OECD : ITF, 2010.
MLA (9th ed.) Zitazioa
Implementing Congestion Charges. OECD : ITF, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.