Cita APA (7th ed.)

National Research Council (U.S.). Highway Research Board. (1971). Social, economic, and environmental factors of transportation: 20 reports. Highway Research Board, National Research Council.

Cita Chicago (17th ed.)

National Research Council (U.S.). Highway Research Board. Social, Economic, and Environmental Factors of Transportation: 20 Reports. Washington, D.C: Highway Research Board, National Research Council, 1971.

Cita MLA (9th ed.)

National Research Council (U.S.). Highway Research Board. Social, Economic, and Environmental Factors of Transportation: 20 Reports. Highway Research Board, National Research Council, 1971.