National Research Council (U.S.). Transportation Research Board. (1997). Traffic records, accident prediction and analysis and statitical methods. National Academy Press.
Dyfyniad Arddull ChicagoNational Research Council (U.S.). Transportation Research Board. Traffic Records, Accident Prediction and Analysis and Statitical Methods. Washington, D.C: National Academy Press, 1997.
Dyfyniad MLANational Research Council (U.S.). Transportation Research Board. Traffic Records, Accident Prediction and Analysis and Statitical Methods. National Academy Press, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.