Dyfyniad APA

Cunard, R. A. (1990). Maintenance management of street and highway signs. Transportation Research Board, National Research Council.

Dyfyniad Arddull Chicago

Cunard, Richard A. Maintenance Management of Street and Highway Signs. Washington, D.C: Transportation Research Board, National Research Council, 1990.

Dyfyniad MLA

Cunard, Richard A. Maintenance Management of Street and Highway Signs. Transportation Research Board, National Research Council, 1990.

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