United States Department of Agriculture, & USDA study team on organic farming. (1980). Report and recommendations on organic farming. United States: United States Department of Agriculture.
استشهاد بنمط شيكاغوUnited States Department of Agriculture, و USDA study team on organic farming. Report and Recommendations On Organic Farming. United States: United States Department of Agriculture, 1980.
MLA استشهادUnited States Department of Agriculture, و USDA study team on organic farming. Report and Recommendations On Organic Farming. United States: United States Department of Agriculture, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.