(1978). Manual on uniform traffic control devices for streets and highways. Washington, D C: U S Department of Transportation.
Chicago-čujuhus (17. p.)Manual on Uniform Traffic Control Devices for Streets and Highways. Washington, D C: U S Department of Transportation, 1978.
MLA-čujuhus (9. p.)Manual on Uniform Traffic Control Devices for Streets and Highways. Washington, D C: U S Department of Transportation, 1978.
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