National Research Council (U.S.). Highway Research Board. Committee on Communications & National Research Council (U.S.). Highway Research Board. Committee on Motorist Services. (1971). Communications and emergency services: 6 reports. Highway Research Board, National Research Council.
Chicagoスタイル(17版)引用形式National Research Council (U.S.). Highway Research Board. Committee on Communications , National Research Council (U.S.). Highway Research Board. Committee on Motorist Services. Communications and Emergency Services: 6 Reports. Washington, D.C: Highway Research Board, National Research Council, 1971.
MLA(9版)引用形式National Research Council (U.S.). Highway Research Board. Committee on Communications , National Research Council (U.S.). Highway Research Board. Committee on Motorist Services. Communications and Emergency Services: 6 Reports. Highway Research Board, National Research Council, 1971.