Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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