Santos, G., & Richardson, H. (2008). The London congestion charging scheme, 2003-2006. Edward Elgar.
Lua i Stíl Chicago (17ú heag.)Santos, G., agus H. Richardson. The London Congestion Charging Scheme, 2003-2006. Edward Elgar, 2008.
Lua MLA (9ú heag.)Santos, G., agus H. Richardson. The London Congestion Charging Scheme, 2003-2006. Edward Elgar, 2008.
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