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.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)National Research Council (U.S.). Transportation Research Board và National Cooperative Highway Research Program. Continuing Project to Synthesize Information on Highway Problems. Washington, D.C: Transportation Research Board, National Research Council, 2001.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)National Research Council (U.S.). Transportation Research Board và National Cooperative Highway Research Program. Continuing Project to Synthesize Information on Highway Problems. Transportation Research Board, National Research Council, 2001.