Não informado. Statistics of world trade in steel. United Nations, Economic Commission for Europe.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Statistics of World Trade in Steel. New York: United Nations, Economic Commission for Europe.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Statistics of World Trade in Steel. United Nations, Economic Commission for Europe.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.