United States department of agriculture, Economic research service, Caswell, M., Fuglie, K., & Ingram, C. (2001). Adoption of agricultural production practices: Lessons learned from the U. S. department of agriculture area studies project.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States department of agriculture, Economic research service, Margriet Caswell, Keith Fuglie, و Cassandra Ingram. Adoption of Agricultural Production Practices: Lessons Learned from the U. S. Department of Agriculture Area Studies Project. 2001.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States department of agriculture, et al. Adoption of Agricultural Production Practices: Lessons Learned from the U. S. Department of Agriculture Area Studies Project. 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.