APA (7th ed.) Citation

Urmson, J. O., & Ackrill, J. L. (1960). The concise encyclopedia of Western philosophy and philosophers ([1st ed.].). Hawthorn Books.

Chicago Style (17th ed.) Citation

Urmson, J. O., and J. L. Ackrill. The Concise Encyclopedia of Western Philosophy and Philosophers. [1st ed.]. New York: Hawthorn Books, 1960.

MLA (9th ed.) Citation

Urmson, J. O., and J. L. Ackrill. The Concise Encyclopedia of Western Philosophy and Philosophers. [1st ed.]. Hawthorn Books, 1960.