National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, & National Research Council (U.S.). Committee on Pedestrians. (1972). Pedestrian protection: 5 reports prepared for the 51st Annual Meeting. Highway Research Board.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, και National Research Council (U.S.). Committee on Pedestrians. Pedestrian Protection: 5 Reports Prepared for the 51st Annual Meeting. Washington: Highway Research Board, 1972.
Παραπομπή σε μορφή MLA (8th εκδ.)National Research Council (U.S.). Highway Research Board, et al. Pedestrian Protection: 5 Reports Prepared for the 51st Annual Meeting. Highway Research Board, 1972.