Cita APA

(1969). Statistics of world trade in steel 1968. New York: United Nations.

Citación estilo Chicago

Statistics of World Trade in Steel 1968. New York: United Nations, 1969.

Cita MLA

Statistics of World Trade in Steel 1968. New York: United Nations, 1969.

Precaución: Estas citas no son 100% exactas.