Dyfyniad APA

423667 Webster, D. C., & Britain), T. R. L. (. (1993). An assessment of rumble strips and rumble areas. Crowthorne, Eng. : TRL.

Dyfyniad Arddull Chicago

423667 Webster, David C., and Transport Research Laboratory (Great Britain). An Assessment of Rumble Strips and Rumble Areas. Crowthorne, Eng. : TRL, 1993.

Dyfyniad MLA

423667 Webster, David C., and Transport Research Laboratory (Great Britain). An Assessment of Rumble Strips and Rumble Areas. Crowthorne, Eng. : TRL, 1993.

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