(1978). Manual on uniform traffic control devices for streets and highways. Washington, D C: U S Department of Transportation.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Manual on Uniform Traffic Control Devices for Streets and Highways. Washington, D C: U S Department of Transportation, 1978.
MLA -ийн эшлэл (9 дэх хэвлэлт)Manual on Uniform Traffic Control Devices for Streets and Highways. Washington, D C: U S Department of Transportation, 1978.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.