Dyfyniad APA

Jeffery, D. J. (1981). Ways and means for improving driver route guidance. Transport and Road Research Laboratory.

Dyfyniad Arddull Chicago

Jeffery, D. J. Ways and Means for Improving Driver Route Guidance. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1981.

Dyfyniad MLA

Jeffery, D. J. Ways and Means for Improving Driver Route Guidance. Transport and Road Research Laboratory, 1981.

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