National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, & National Research Council (U.S.). Committee on Maintenance and Operations Costs. (1972). Maintenance systems: Estimating maintenance costs, solid-waste disposal systems, maintenance station locations, manager training, and equipment management ; 7 reports. Highway Research Board.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, و National Research Council (U.S.). Committee on Maintenance and Operations Costs. Maintenance Systems: Estimating Maintenance Costs, Solid-waste Disposal Systems, Maintenance Station Locations, Manager Training, and Equipment Management ; 7 Reports. Washington, D.C: Highway Research Board, 1972.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Highway Research Board, et al. Maintenance Systems: Estimating Maintenance Costs, Solid-waste Disposal Systems, Maintenance Station Locations, Manager Training, and Equipment Management ; 7 Reports. Highway Research Board, 1972.