Παραπομπή APA

Button,Kenneth J, & Verhoef,Erik T. Road pricing,Traffic congestion and the environment. Edward Elgar Publishing Ltd.

Παραπομπή Chicago Style

Button,Kenneth J, και Verhoef,Erik T. Road Pricing,Traffic Congestion and the Environment. U K: Edward Elgar Publishing Ltd.

Παραπομπή MLA

Button,Kenneth J, και Verhoef,Erik T. Road Pricing,Traffic Congestion and the Environment. Edward Elgar Publishing Ltd.