lohr, v. (1974). problems of determining the role of agriculture in the development of national economy and society. the institute of national planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)lohr, v. Problems of Determining the Role of Agriculture in the Development of National Economy and Society. cairo: the institute of national planning, 1974.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)lohr, v. Problems of Determining the Role of Agriculture in the Development of National Economy and Society. the institute of national planning, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.