Smith, R. P. (1975). Consumer demand for cars in the USA. New York: Cambridge University Press.
Dyfyniad Arddull ChicagoSmith, R. P. Consumer Demand for Cars in the USA. New York: Cambridge University Press, 1975.
Dyfyniad MLASmith, R. P. Consumer Demand for Cars in the USA. New York: Cambridge University Press, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.