United States. Federal Highway Administration. Implementation Division. (1985). Traffic control systems handbook: Revised, April 1985. The Administration : U.S. Govt. Print. Off.
Cita Chicago Style (17a ed.)United States. Federal Highway Administration. Implementation Division. Traffic Control Systems Handbook: Revised, April 1985. Washington: The Administration : U.S. Govt. Print. Off, 1985.
Cita MLA (9a ed.)United States. Federal Highway Administration. Implementation Division. Traffic Control Systems Handbook: Revised, April 1985. The Administration : U.S. Govt. Print. Off, 1985.
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