National Research Council (U.S.). Transportation Research Board. (1990). Continuing project to synthesize information on highway problems. Transportation Research Board, National Research Council.
Chicago Style aipamenaNational Research Council (U.S.). Transportation Research Board. Continuing Project to Synthesize Information on Highway Problems. Washington, D.C: Transportation Research Board, National Research Council, 1990.
MLA aipamenaNational Research Council (U.S.). Transportation Research Board. Continuing Project to Synthesize Information on Highway Problems. Transportation Research Board, National Research Council, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.