Dyfyniad APA

National Cooperative Highway Research Program. Summary of progress - National Cooperative Highway Research Program 2001. Highway Research Board, National Research Council.

Dyfyniad Arddull Chicago

National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 2001. [Washington]: Highway Research Board, National Research Council.

Dyfyniad MLA

National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 2001. Highway Research Board, National Research Council.

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