Cox, B. E. (1990). The United Sates Strategic highway research program. Transport and Road Research Laboratory.
Chicago-referens (17:e uppl.)Cox, B. E. The United Sates Strategic Highway Research Program. Crowthorne, Eng.: Transport and Road Research Laboratory, 1990.
MLA-referens (9:e uppl.)Cox, B. E. The United Sates Strategic Highway Research Program. Transport and Road Research Laboratory, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.