APA (7th ed.) Citation

Simon, F. (2007). Horrid Henry Rules The World. Orion Children's Books.

Chicago Style (17th ed.) Citation

Simon, Francesca. Horrid Henry Rules The World. London: Orion Children's Books, 2007.

MLA (9th ed.) Citation

Simon, Francesca. Horrid Henry Rules The World. Orion Children's Books, 2007.

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