APA
United Nation (Economic commission for-), United Nation (Economic commission for-), . (1998). Annual bulletin of statistics of world trade in steel. New York: United Nation.
Chicago
United Nation (Economic commission for-), United Nation (Economic commission for-), . 1998. Annual bulletin of statistics of world trade in steel. New York: United Nation.
Harvard
United Nation (Economic commission for-), United Nation (Economic commission for-), . (1998). Annual bulletin of statistics of world trade in steel. New York: United Nation.
MLA
United Nation (Economic commission for-), United Nation (Economic commission for-), . Annual bulletin of statistics of world trade in steel. New York: United Nation. 1998.
