Não informado. (1958). Industrialization and Productivity. United Nations, Department of Economic and Social Affairs.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Industrialization and Productivity. New York: United Nations, Department of Economic and Social Affairs, 1958.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Industrialization and Productivity. United Nations, Department of Economic and Social Affairs, 1958.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.