Dyfyniad APA

National Research Council (U.S.). Transportation Research Board. (1990). Continuing project to synthesize information on highway problems. Transportation Research Board, National Research Council.

Dyfyniad Arddull Chicago

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, 1990.

Dyfyniad MLA

National Research Council (U.S.). Transportation Research Board. Continuing Project to Synthesize Information on Highway Problems. Transportation Research Board, National Research Council, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.