National Research Council (U.S.). Highway Research Board. (1973). Freeway operational improvements. National Academy of Science - National Research Council.
Citação do estilo Chicago (17ª ed.)National Research Council (U.S.). Highway Research Board. Freeway Operational Improvements. Washington, D.C: National Academy of Science - National Research Council, 1973.
Citação MLA (9ª ed.)National Research Council (U.S.). Highway Research Board. Freeway Operational Improvements. National Academy of Science - National Research Council, 1973.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.