MLA

Bentall, Richard P., and Aaron T Beck. Madness Explained : Psychosis and Human Nature. London: Penguin, 2004.

APA

Bentall, R. P., & Beck, A. T. (2004). Madness explained : psychosis and human nature. London: Penguin.

Chicago

Bentall, Richard P., and Aaron T. Beck. Madness Explained: Psychosis and Human Nature. London: Penguin, 2004.