Newsome, L. R. (1967). A perceptual factor that could contribute to road accidents. Road Research Laboratory.
Chicago-referens (17:e uppl.)Newsome, L. R. A Perceptual Factor That Could Contribute to Road Accidents. Crowthorne: Road Research Laboratory, 1967.
MLA-referens (9:e uppl.)Newsome, L. R. A Perceptual Factor That Could Contribute to Road Accidents. Road Research Laboratory, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.