National Research Council (U.S.). Transportation Research Board & National Cooperative Highway Research Program. (2001). Continuing project to synthesize information on highway problems. Transportation Research Board, National Research Council.
Cita Chicago Style (17a ed.)National Research Council (U.S.). Transportation Research Board y National Cooperative Highway Research Program. Continuing Project to Synthesize Information on Highway Problems. Washington, D.C: Transportation Research Board, National Research Council, 2001.
Cita MLA (9a ed.)National Research Council (U.S.). Transportation Research Board y National Cooperative Highway Research Program. Continuing Project to Synthesize Information on Highway Problems. Transportation Research Board, National Research Council, 2001.