Universities National Bureau Committee for Economic Research. (1965). Transportation economics: A conference of the Universities-National bureau committee for economic research. New York: Distributed by Columbia University Press.
Dyfyniad Arddull ChicagoUniversities National Bureau Committee for Economic Research. Transportation Economics: A Conference of the Universities-National Bureau Committee for Economic Research. New York: Distributed by Columbia University Press, 1965.
Dyfyniad MLAUniversities National Bureau Committee for Economic Research. Transportation Economics: A Conference of the Universities-National Bureau Committee for Economic Research. New York: Distributed by Columbia University Press, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.