National Research Council (U.S). Transportation Research Board. (1985). Transportation system management and signal systems. Transportation Research Board, National Research Council.
Chicago-referens (17:e uppl.)National Research Council (U.S). Transportation Research Board. Transportation System Management and Signal Systems. Washington, D.C.: Transportation Research Board, National Research Council, 1985.
MLA-referens (9:e uppl.)National Research Council (U.S). Transportation Research Board. Transportation System Management and Signal Systems. Transportation Research Board, National Research Council, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.