APA
United Nations.Department of Economic and Social Affairs, . (1971). Basic principles of the system of balances of the national economy. New York: United Nations.
Chicago
United Nations.Department of Economic and Social Affairs, . 1971. Basic principles of the system of balances of the national economy. New York: United Nations.
Harvard
United Nations.Department of Economic and Social Affairs, . (1971). Basic principles of the system of balances of the national economy. New York: United Nations.
MLA
United Nations.Department of Economic and Social Affairs, . Basic principles of the system of balances of the national economy. New York: United Nations. 1971.