(1997). Transport in the urban environment. London: The Institution of Highways and Transportation.
Παραπομπή Chicago StyleTransport in the Urban Environment. London: The Institution of Highways and Transportation, 1997.
Παραπομπή MLATransport in the Urban Environment. London: The Institution of Highways and Transportation, 1997.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.