APA

,, . (1951). Year book of the United Nations, 1951. New York: UNO.

Chicago

,, . 1951. Year book of the United Nations, 1951. New York: UNO.

Harvard

,, . (1951). Year book of the United Nations, 1951. New York: UNO.

MLA

,, . Year book of the United Nations, 1951. New York: UNO. 1951.