United Nations. Economic Commission for Europe. (1980). Measures for saving materials in engineering industries. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations. Economic Commission for Europe. Measures for Saving Materials in Engineering Industries. New York: United Nations, 1980.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United Nations. Economic Commission for Europe. Measures for Saving Materials in Engineering Industries. United Nations, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.