National Research Council (U.S.). Subcommittee on Beef Cattle Nutrition & ebrary, Inc. (1996). Nutrient requirements of beef cattle (7th rev. ed.). National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Subcommittee on Beef Cattle Nutrition و Inc ebrary. Nutrient Requirements of Beef Cattle. 7th rev. ed. Washington, D.C.: National Academy Press, 1996.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Subcommittee on Beef Cattle Nutrition و Inc ebrary. Nutrient Requirements of Beef Cattle. 7th rev. ed. National Academy Press, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.