National Joint Committee on Uniform Traffic Control Devices & American Association of State Highway Officials. (1971). Manual on uniform traffic control devices for streets and highways. Federal Highway Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Joint Committee on Uniform Traffic Control Devices και American Association of State Highway Officials. Manual on Uniform Traffic Control Devices for Streets and Highways. Washington]: Federal Highway Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1971.
Παραπομπή σε μορφή MLA (9th εκδ.)National Joint Committee on Uniform Traffic Control Devices και American Association of State Highway Officials. Manual on Uniform Traffic Control Devices for Streets and Highways. Federal Highway Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1971.