APA (7th ed.) Citation

Mandel, E., Cannon, J. P., & Charlier, F. (1968). 50 years of world revolution 1917-1967: An international symposium. New York: Merit Publishers.

Chicago Style (17th ed.) Citation

Mandel, Ernest, James P. Cannon, and Fernand Charlier. 50 Years of World Revolution 1917-1967: An International Symposium. New York: Merit Publishers, 1968.

MLA (8th ed.) Citation

Mandel, Ernest, et al. 50 Years of World Revolution 1917-1967: An International Symposium. New York: Merit Publishers, 1968.