National Joint Committee on Uniform Traffic Control Devices. (1961). Manual on uniform traffic control devices for streets and highways. Bureau of Public Roads.
Chicago-Zitierstil (17. Ausg.)National Joint Committee on Uniform Traffic Control Devices. Manual on Uniform Traffic Control Devices for Streets and Highways. Wash.: Bureau of Public Roads, 1961.
MLA-Zitierstil (8. Ausg.)National Joint Committee on Uniform Traffic Control Devices. Manual on Uniform Traffic Control Devices for Streets and Highways. Bureau of Public Roads, 1961.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.