National Research Council (U.S.). Highway Research Board. (1961). Line-haul trucking costs in relation to vehicle gross weights: Presented at the 40th Annual Meeting, January 9-13, 1961. National Academy of Sciences-Nationl Research Council.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Highway Research Board. Line-haul Trucking Costs in Relation to Vehicle Gross Weights: Presented at the 40th Annual Meeting, January 9-13, 1961. Washington, D.C: National Academy of Sciences-Nationl Research Council, 1961.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Highway Research Board. Line-haul Trucking Costs in Relation to Vehicle Gross Weights: Presented at the 40th Annual Meeting, January 9-13, 1961. National Academy of Sciences-Nationl Research Council, 1961.