APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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