the institute of national planning & El Wahab, N. S. (1998). A New Approach for Pricing Agricultural Land in Egypt Considering Policy reforms and environmental concepts. The Institute of National Planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)the institute of national planning و Nagwan S.Abd El Wahab. A New Approach for Pricing Agricultural Land in Egypt Considering Policy Reforms and Environmental Concepts. Cairo: The Institute of National Planning, 1998.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)the institute of national planning و Nagwan S.Abd El Wahab. A New Approach for Pricing Agricultural Land in Egypt Considering Policy Reforms and Environmental Concepts. The Institute of National Planning, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.