United nations industrial development organization. (1981). World industry in 1980: Regular issue of the biennial industrial development survey. New York: United nations.
Chicago-tyylinen lähdeviittausUnited nations industrial development organization. World Industry in 1980: Regular Issue of the Biennial Industrial Development Survey. New York: United nations, 1981.
MLA-viiteUnited nations industrial development organization. World Industry in 1980: Regular Issue of the Biennial Industrial Development Survey. New York: United nations, 1981.
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