Dyfyniad APA

(1992). Pavement surface properties: Roughness, rutting, skid resistance, and surface distress. Transportation Research Board, National Research Council.

Dyfyniad Arddull Chicago

Pavement Surface Properties: Roughness, Rutting, Skid Resistance, and Surface Distress. Washington, D.C: Transportation Research Board, National Research Council, 1992.

Dyfyniad MLA

Pavement Surface Properties: Roughness, Rutting, Skid Resistance, and Surface Distress. Transportation Research Board, National Research Council, 1992.

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