APA (7th ed.) Citation

European Seminar on Probation 1952, London, & Vereinte Nationen. (1954). European Seminar on Probation: London, 20-30 October 1952. UN.

Chicago Style (17th ed.) Citation

European Seminar on Probation 1952, London, and Vereinte Nationen. European Seminar on Probation: London, 20-30 October 1952. New York: UN, 1954.

MLA (9th ed.) Citation

European Seminar on Probation 1952, London, and Vereinte Nationen. European Seminar on Probation: London, 20-30 October 1952. UN, 1954.