APA (7th ed.) Citation

Conference on Conditions of World Order, Bellagio, Italy, 1965, Congress for Cultural Freedom, & Hoffman, S. (1968). Conditions of world order. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Conference on Conditions of World Order, Bellagio, Italy, 1965, Congress for Cultural Freedom, and Stanley Hoffman. Conditions of World Order. Boston: Houghton Mifflin, 1968.

MLA (9th ed.) Citation

Conference on Conditions of World Order, Bellagio, Italy, 1965, et al. Conditions of World Order. Houghton Mifflin, 1968.