National Research Council (U.S.). Committee on Twenty-First Century Systems Agriculture & ebrary, Inc. (2010). Toward sustainable agricultural systems in the 21st century. National Academies Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Committee on Twenty-First Century Systems Agriculture و Inc ebrary. Toward Sustainable Agricultural Systems in the 21st Century. Washington, D.C.: National Academies Press, 2010.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Committee on Twenty-First Century Systems Agriculture و Inc ebrary. Toward Sustainable Agricultural Systems in the 21st Century. National Academies Press, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.