National Research Council (U.S.). Transportation Research Board. (1998). Testing of conventional and unconventional aggregates and soils. National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Transportation Research Board. Testing of Conventional and Unconventional Aggregates and Soils. Washington, D.C: National Academy Press, 1998.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Transportation Research Board. Testing of Conventional and Unconventional Aggregates and Soils. National Academy Press, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.