Cita APA (7a ed.)

Witherall, A. (2016). The problem of existence. Routledge.

Cita Chicago Style (17a ed.)

Witherall, Arthur. The Problem of Existence. London, [England] ; New York, New York: Routledge, 2016.

Cita MLA (8a ed.)

Witherall, Arthur. The Problem of Existence. Routledge, 2016.