APA
United Nations. Deperatment of Economic and Social Affairs, . (1971). Tax reform planning. New York: United Nations.
Chicago
United Nations. Deperatment of Economic and Social Affairs, . 1971. Tax reform planning. New York: United Nations.
Harvard
United Nations. Deperatment of Economic and Social Affairs, . (1971). Tax reform planning. New York: United Nations.
MLA
United Nations. Deperatment of Economic and Social Affairs, . Tax reform planning. New York: United Nations. 1971.