Abbott, M. (1990). Combinable crops and the EC: A guide to European Community price support mechanisms and legislation affecting the marketing of cereals, and other combinable crops. BSP Professional Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Abbott, Mary. Combinable Crops and the EC: A Guide to European Community Price Support Mechanisms and Legislation Affecting the Marketing of Cereals, and Other Combinable Crops. Oxford: BSP Professional Books, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Abbott, Mary. Combinable Crops and the EC: A Guide to European Community Price Support Mechanisms and Legislation Affecting the Marketing of Cereals, and Other Combinable Crops. BSP Professional Books, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.