United nations industrial development organization. (1981). World industry in 1980: Regular issue of the biennial industrial development survey. New York: United nations.
Trích dẫn kiểu ChicagoUnited nations industrial development organization. World Industry in 1980: Regular Issue of the Biennial Industrial Development Survey. New York: United nations, 1981.
MLA引文United nations industrial development organization. World Industry in 1980: Regular Issue of the Biennial Industrial Development Survey. New York: United nations, 1981.
警告:这些引文格式不一定是100%准确.