Grigg, A. O., & Huddart, L. (1978). Three surveys of the visual intrusion of roads in rural landscapes. Transport and Road Research Laboratory.
Citazione stile Chigago Style (17a edizione)Grigg, A. O., e L. Huddart. Three Surveys of the Visual Intrusion of Roads in Rural Landscapes. Crowthorne, [Eng.]: Transport and Road Research Laboratory, 1978.
Citatione MLA (9a ed.)Grigg, A. O., e L. Huddart. Three Surveys of the Visual Intrusion of Roads in Rural Landscapes. Transport and Road Research Laboratory, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.