Santos, G. (2008). The London congestion charging. Brookings Institution Press.
Cita Chicago (17th ed.)Santos, G. The London Congestion Charging. Brookings Institution Press, 2008.
Cita MLA (9th ed.)Santos, G. The London Congestion Charging. Brookings Institution Press, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.