Não informado. (1966). World survey of current research and development on roads and road transport. International Road Federation.
Chicago-referens (17:e uppl.)Não informado. World Survey of Current Research and Development on Roads and Road Transport. Washington: International Road Federation, 1966.
MLA-referens (8:e uppl.)Não informado. World Survey of Current Research and Development on Roads and Road Transport. International Road Federation, 1966.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.