APA (7th ed.) Citation

Simon, F., & Ross, T. (2007). Horrid Henry and the Abominable Snowman. Orion Childre's Books.

Chicago Style (17th ed.) Citation

Simon, Francesca, and Tony Ross. Horrid Henry and the Abominable Snowman. Great Britain: Orion Childre's Books, 2007.

MLA (9th ed.) Citation

Simon, Francesca, and Tony Ross. Horrid Henry and the Abominable Snowman. Orion Childre's Books, 2007.