Organization for Economic Cooperation and Development. Steering Committee for Road Research. (1972). Road research publications, 1968-1972: Construction, safety, traffic. Organisation for Economic Co-operation and Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Organization for Economic Cooperation and Development. Steering Committee for Road Research. Road Research Publications, 1968-1972: Construction, Safety, Traffic. [Paris]: Organisation for Economic Co-operation and Development, 1972.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Organization for Economic Cooperation and Development. Steering Committee for Road Research. Road Research Publications, 1968-1972: Construction, Safety, Traffic. Organisation for Economic Co-operation and Development, 1972.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.