APA aipamena

Santos, G. (2008). The London congestion charging. Brookings Institution Press.

Chicago Style aipamena

Santos, G. The London Congestion Charging. Brookings Institution Press, 2008.

MLA aipamena

Santos, G. The London Congestion Charging. Brookings Institution Press, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.