APA (7th ed.) Citation

McGowan, A., & Riddell, C. (2017). I killed Father Christmas (First published.). Barrington Stoke.

Chicago Style (17th ed.) Citation

McGowan, Anthony, and Chris Riddell. I Killed Father Christmas. First published. Edinburgh: Barrington Stoke, 2017.

MLA (9th ed.) Citation

McGowan, Anthony, and Chris Riddell. I Killed Father Christmas. First published. Barrington Stoke, 2017.