Dyfyniad APA

National Research Council (U.S.). Transportation Research Board. (1998). Freight transportation: Planning, motor carrier size and weight issues, international trade, and hazardous materials transport. National Academy Press.

Dyfyniad Arddull Chicago

National Research Council (U.S.). Transportation Research Board. Freight Transportation: Planning, Motor Carrier Size and Weight Issues, International Trade, and Hazardous Materials Transport. Washington, D.C: National Academy Press, 1998.

Dyfyniad MLA

National Research Council (U.S.). Transportation Research Board. Freight Transportation: Planning, Motor Carrier Size and Weight Issues, International Trade, and Hazardous Materials Transport. National Academy Press, 1998.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.