(1978). Manual on uniform traffic control devices for streets and highways. Washington, D C: U S Department of Transportation.
Chicago-Zitierstil (17. Ausg.)Manual on Uniform Traffic Control Devices for Streets and Highways. Washington, D C: U S Department of Transportation, 1978.
MLA-Zitierstil (9. Ausg.)Manual on Uniform Traffic Control Devices for Streets and Highways. Washington, D C: U S Department of Transportation, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.