Não informado. (2008). Roads and road construction year book & directory. Carriers Publishing Company.
Chicago-referens (17:e uppl.)Não informado. Roads and Road Construction Year Book & Directory. London: Carriers Publishing Company, 2008.
MLA-referens (8:e uppl.)Não informado. Roads and Road Construction Year Book & Directory. Carriers Publishing Company, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.