APA (7th ed.) Citation

Nicholas, H. G. (1967). The United Nations as a political institution / by H.G. Nicholas (3rd ed.). O.U.P..

Chicago Style (17th ed.) Citation

Nicholas, H. G. The United Nations as a Political Institution / by H.G. Nicholas. 3rd ed. O.U.P., 1967.

MLA (9th ed.) Citation

Nicholas, H. G. The United Nations as a Political Institution / by H.G. Nicholas. 3rd ed. O.U.P., 1967.

Warning: These citations may not always be 100% accurate.