APA (7th ed.) Citation

Nicholas. (1971). The United Nations as a political institution (4th ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Nicholas. The United Nations as a Political Institution. 4th ed. London New York: Oxford University Press, 1971.

MLA (8th ed.) Citation

Nicholas. The United Nations as a Political Institution. 4th ed. Oxford University Press, 1971.