Cita APA (7a ed.)

Williams, C. (1981). Whats is existence? Clarendon Press.

Cita Chicago Style (17a ed.)

Williams, C.J.F. Whats Is Existence? Oxford: Clarendon Press, 1981.

Cita MLA (9a ed.)

Williams, C.J.F. Whats Is Existence? Clarendon Press, 1981.