United Nations. Economic Commission for Europe. Statistics of world trade in steel. United Nations, Economic Commission for Europe.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations. Economic Commission for Europe. Statistics of World Trade in Steel. New York [etc.]: United Nations, Economic Commission for Europe.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United Nations. Economic Commission for Europe. Statistics of World Trade in Steel. United Nations, Economic Commission for Europe.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.