National Cooperative Highway Research Program & National Research Council (U.S.). Transportation Research Board. (2004). Continuing project to synthesize information on highway problems. Transportation Research Board, National Research Council.
Chicago-viite (17. p.)National Cooperative Highway Research Program ja National Research Council (U.S.). Transportation Research Board. Continuing Project to Synthesize Information on Highway Problems. Washington, D.C: Transportation Research Board, National Research Council, 2004.
MLA-viite (9. p.)National Cooperative Highway Research Program ja National Research Council (U.S.). Transportation Research Board. Continuing Project to Synthesize Information on Highway Problems. Transportation Research Board, National Research Council, 2004.