Citazione Stile APA (7a Edizione)

National Cooperative Highway Research Program & National Research Council (U.S.). Transportation Research Board. (1976). Current practices in use of retroreflective signing materials. Transportation Research Board.

Citazione stile Chigago Style (17a edizione)

National Cooperative Highway Research Program e National Research Council (U.S.). Transportation Research Board. Current Practices in Use of Retroreflective Signing Materials. Washington, D.C: Transportation Research Board, 1976.

Citatione MLA (9a ed.)

National Cooperative Highway Research Program e National Research Council (U.S.). Transportation Research Board. Current Practices in Use of Retroreflective Signing Materials. Transportation Research Board, 1976.