Cita APA (7a ed.)
(1981). Statistics of World trade in steell 1980. United Nations.
Cita Chicago Style (17a ed.)
Statistics of World Trade in Steell 1980. New York: United Nations, 1981.
Cita MLA (9a ed.)
Statistics of World Trade in Steell 1980. United Nations, 1981.
Precaución: Estas citas no son 100% exactas.