APA (7th ed.) Citation

John Mortimer. (1998). Felix in the underworld. Penguin.

Chicago Style (17th ed.) Citation

John Mortimer. Felix in the Underworld. London: Penguin, 1998.

MLA (9th ed.) Citation

John Mortimer. Felix in the Underworld. Penguin, 1998.

Warning: These citations may not always be 100% accurate.