Não informado. Statistics of world trade in steel. United Nations, Economic Commission for Europe.
Chicago-Zitierstil (17. Ausg.)Não informado. Statistics of World Trade in Steel. New York: United Nations, Economic Commission for Europe.
MLA-Zitierstil (8. Ausg.)Não informado. Statistics of World Trade in Steel. United Nations, Economic Commission for Europe.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.