APA
United Nations (. o. s., United Nations (. o. s., . (1951). Summary of world trade statistics. New York: United Nations.
Chicago
United Nations (Office of-) statistical, United Nations (Office of-) statistical, . 1951. Summary of world trade statistics. New York: United Nations.
Harvard
United Nations (. o. s., United Nations (. o. s., . (1951). Summary of world trade statistics. New York: United Nations.
MLA
United Nations (Office of-) statistical, United Nations (Office of-) statistical, . Summary of world trade statistics. New York: United Nations. 1951.
