National Cooperative Highway Research Program. Summary of progress - National Cooperative Highway Research Program 2005. Highway Research Board, National Research Council.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 2005. [Washington]: Highway Research Board, National Research Council.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 2005. Highway Research Board, National Research Council.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.