APA (7th ed.) Citation

Mortimer, J. C. (1997). Felix in the underworld. Viking.

Chicago Style (17th ed.) Citation

Mortimer, John Clifford. Felix in the Underworld. London [u.a.]: Viking, 1997.

MLA (9th ed.) Citation

Mortimer, John Clifford. Felix in the Underworld. Viking, 1997.