APA (7th ed.) Citation

Van Inwagen, P. (1983). An essay on free will. Clarendon Press.

Chicago Style (17th ed.) Citation

Van Inwagen, Peter. An Essay on Free Will. Oxford: Clarendon Press, 1983.

MLA (9th ed.) Citation

Van Inwagen, Peter. An Essay on Free Will. Clarendon Press, 1983.