United States. Dept. of Agriculture. Economics and Statistics Service, Jensen, H. R., Harrington, D. H., & Hatch, T. C. Economic well-being of farms. The Service,.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Dept. of Agriculture. Economics and Statistics Service, Harald R. Jensen, David H. Harrington, و Thomas C. Hatch. Economic Well-being of Farms. Washington, D.C.: The Service,.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United States. Dept. of Agriculture. Economics and Statistics Service, et al. Economic Well-being of Farms. The Service,.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.