United Nations. Dept. of Technical Cooperation for Development. (1987). Guidelines for development planning: Procedures, methods, and techniques. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations. Dept. of Technical Cooperation for Development. Guidelines for Development Planning: Procedures, Methods, and Techniques. New York: United Nations, 1987.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United Nations. Dept. of Technical Cooperation for Development. Guidelines for Development Planning: Procedures, Methods, and Techniques. United Nations, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.