Gregory, J. M. (1981). The design of experimental concrete carriageways on M180 (Sandtoft to Trent section). Transport and Road Research Laboratory.
Chicago-referens (17:e uppl.)Gregory, J. M. The Design of Experimental Concrete Carriageways on M180 (Sandtoft to Trent Section). Crowthorne, Berkshire: Transport and Road Research Laboratory, 1981.
MLA-referens (9:e uppl.)Gregory, J. M. The Design of Experimental Concrete Carriageways on M180 (Sandtoft to Trent Section). Transport and Road Research Laboratory, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.