Transportation Research Board. (1982). Traffic control devices and traffic signal systems. Transportation Research Board.
Chicago-Zitierstil (17. Ausg.)Transportation Research Board. Traffic Control Devices and Traffic Signal Systems. Washington, D.C: Transportation Research Board, 1982.
MLA-Zitierstil (9. Ausg.)Transportation Research Board. Traffic Control Devices and Traffic Signal Systems. Transportation Research Board, 1982.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.