Dyfyniad APA

Grigg, A. O., & Huddart, L. (1978). Three surveys of the visual intrusion of roads in rural landscapes. Transport and Road Research Laboratory.

Dyfyniad Arddull Chicago

Grigg, A. O., and L. Huddart. Three Surveys of the Visual Intrusion of Roads in Rural Landscapes. Crowthorne, [Eng.]: Transport and Road Research Laboratory, 1978.

Dyfyniad MLA

Grigg, A. O., and L. Huddart. Three Surveys of the Visual Intrusion of Roads in Rural Landscapes. Transport and Road Research Laboratory, 1978.

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