Não informado. (1961). Transportation journal. American Society of Traffic and Transportation.
Chicago-referens (17:e uppl.)Não informado. Transportation Journal. Louisville, Ky: American Society of Traffic and Transportation, 1961.
MLA-referens (8:e uppl.)Não informado. Transportation Journal. American Society of Traffic and Transportation, 1961.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.