National Cooperative Highway Research Program & National Research Council (U.S.). Transportation Research Board. (1976). Continuing project to synthesize information on highway problems. Transportation Research Board.
Chicago-referens (17:e uppl.)National Cooperative Highway Research Program och National Research Council (U.S.). Transportation Research Board. Continuing Project to Synthesize Information on Highway Problems. Washington, D.C: Transportation Research Board, 1976.
MLA-referens (9:e uppl.)National Cooperative Highway Research Program och National Research Council (U.S.). Transportation Research Board. Continuing Project to Synthesize Information on Highway Problems. Transportation Research Board, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.