APA (7th ed.) Citation

(1992). Communications, traffic signals, and traffic control devices, 1991. Transportation Research Board, National Research Council.

Chicago Style (17th ed.) Citation

Communications, Traffic Signals, and Traffic Control Devices, 1991. Washington, D.C: Transportation Research Board, National Research Council, 1992.

MLA (9th ed.) Citation

Communications, Traffic Signals, and Traffic Control Devices, 1991. Transportation Research Board, National Research Council, 1992.

Warning: These citations may not always be 100% accurate.