APA (7th ed.) Citation

United Nations. Dept. of Public Information. (1955). The first ten years. s. n.

Chicago Style (17th ed.) Citation

United Nations. Dept. of Public Information. The First Ten Years. [New York: s. n, 1955.

MLA (9th ed.) Citation

United Nations. Dept. of Public Information. The First Ten Years. s. n, 1955.