Button, K. J., & Hensher, D. A. (2001). Handbook of transport systems and traffic control. Pergamon.
Lua i Stíl Chicago (17ú heag.)Button, Kenneth J., agus David A. Hensher. Handbook of Transport Systems and Traffic Control. Amsterdam: Pergamon, 2001.
Lua MLA (9ú heag.)Button, Kenneth J., agus David A. Hensher. Handbook of Transport Systems and Traffic Control. Pergamon, 2001.
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