Dyfyniad APA

Santos, G., & Richardson, H. (2008). The London congestion charging scheme, 2003-2006. Edward Elgar.

Dyfyniad Arddull Chicago

Santos, G., and H. Richardson. The London Congestion Charging Scheme, 2003-2006. Edward Elgar, 2008.

Dyfyniad MLA

Santos, G., and H. Richardson. The London Congestion Charging Scheme, 2003-2006. Edward Elgar, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.