APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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