National Joint Committee on Uniform Traffic Control Devices. (1961). Manual on uniform traffic control devices for streets and highways. Bureau of Public Roads.
Citação do estilo Chicago (17ª ed.)National Joint Committee on Uniform Traffic Control Devices. Manual on Uniform Traffic Control Devices for Streets and Highways. Wash.: Bureau of Public Roads, 1961.
Citação MLA (8ª ed.)National Joint Committee on Uniform Traffic Control Devices. Manual on Uniform Traffic Control Devices for Streets and Highways. Bureau of Public Roads, 1961.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.