Milk production / Crop Reporting Board, Economics, Statistics, & Cooperatives Service, U.S. Department of Agriculture.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Milk Production / Crop Reporting Board, Economics, Statistics, & Cooperatives Service, U.S. Department of Agriculture.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Milk Production / Crop Reporting Board, Economics, Statistics, & Cooperatives Service, U.S. Department of Agriculture.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.