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.
ציטוט MLAUnited nations industrial development organization. World Industry in 1980: Regular Issue of the Biennial Industrial Development Survey. New York: United nations, 1981.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.