APA (7th ed.) Citation

Simon, F. (1998). Horrid Henry. Orion Children's Books.

Chicago Style (17th ed.) Citation

Simon, Francesca. Horrid Henry. London: Orion Children's Books, 1998.

MLA (9th ed.) Citation

Simon, Francesca. Horrid Henry. Orion Children's Books, 1998.

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