Dyfyniad APA

National Research Council (U.S.). Highway Research Board. (1973). Environmental considerations in planning, design, and construction. Highway Research Board.

Dyfyniad Arddull Chicago

National Research Council (U.S.). Highway Research Board. Environmental Considerations in Planning, Design, and Construction. Washington: Highway Research Board, 1973.

Dyfyniad MLA

National Research Council (U.S.). Highway Research Board. Environmental Considerations in Planning, Design, and Construction. Highway Research Board, 1973.

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