organization for economic cooperation. (1973). .maintenance of rural roads: Principles of a road maintenance management system;a report preparedborganization for economic coopertion and development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)organization for economic cooperation. .maintenance of Rural Roads: Principles of a Road Maintenance Management System;a Report Preparedborganization for Economic Coopertion and Development. 1st ed. | .Paris, 1973.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)organization for economic cooperation. .maintenance of Rural Roads: Principles of a Road Maintenance Management System;a Report Preparedborganization for Economic Coopertion and Development. 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.