United Nations. Dept. of Public Information. (1958). Notes for speakers. s.n.
Cita Chicago (17th ed.)United Nations. Dept. of Public Information. Notes for Speakers. New York: s.n, 1958.
Cita MLA (9th ed.)United Nations. Dept. of Public Information. Notes for Speakers. s.n, 1958.
Atenció: Aquestes cites poden no estar 100% correctes.