Citazione Stile APA (7a Edizione)

National Cooperative Highway Research Program. Summary of progress - National Cooperative Highway Research Program 1972. Highway Research Board, National Research Council.

Citazione stile Chigago Style (17a edizione)

National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 1972. [Washington]: Highway Research Board, National Research Council.

Citatione MLA (9a ed.)

National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 1972. Highway Research Board, National Research Council.