Transportation Research Board. (1982). Traffic control devices and traffic signal systems. Transportation Research Board.
Citazione stile Chigago Style (17a edizione)Transportation Research Board. Traffic Control Devices and Traffic Signal Systems. Washington, D.C: Transportation Research Board, 1982.
Citatione MLA (9a ed.)Transportation Research Board. Traffic Control Devices and Traffic Signal Systems. Transportation Research Board, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.