APA

,, . (1972). Year book of the United Nations, 1972. New York: UNO.

Chicago

,, . 1972. Year book of the United Nations, 1972. New York: UNO.

Harvard

,, . (1972). Year book of the United Nations, 1972. New York: UNO.

MLA

,, . Year book of the United Nations, 1972. New York: UNO. 1972.