Walker, J. (2018). Road pricing: Technologies, economics and acceptability. The Institution of Engineering and Technology. https://doi.org/10.1049/PBTR008E
Chicago Style (17. basım) AtıfWalker, John. Road Pricing: Technologies, Economics and Acceptability. London, United Kingdom: The Institution of Engineering and Technology, 2018. https://doi.org/10.1049/PBTR008E.
MLA (9th ed.) AtıfWalker, John. Road Pricing: Technologies, Economics and Acceptability. The Institution of Engineering and Technology, 2018. https://doi.org/10.1049/PBTR008E.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..