ebrary, Inc, & Forum on Sustainable Agriculture and Natural Resource Management. (1991). Toward sustainability: A plan for collaborative research on agriculture and natural resource management. National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, و Forum on Sustainable Agriculture and Natural Resource Management. Toward Sustainability: A Plan for Collaborative Research on Agriculture and Natural Resource Management. Washington, D.C.: National Academy Press, 1991.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, و Forum on Sustainable Agriculture and Natural Resource Management. Toward Sustainability: A Plan for Collaborative Research on Agriculture and Natural Resource Management. National Academy Press, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.