United Nations. Dept. of Economic and Social Affairs. (1974). Organization and administration of environmental programmes. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations. Dept. of Economic and Social Affairs. Organization and Administration of Environmental Programmes. New York: United Nations, 1974.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United Nations. Dept. of Economic and Social Affairs. Organization and Administration of Environmental Programmes. United Nations, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.