APA (7th ed.) Citation

Francesca Simon & Tony Ross. (2006). A giant slice of Horrid Henry. Orion Children's.

Chicago Style (17th ed.) Citation

Francesca Simon and Tony Ross. A Giant Slice of Horrid Henry. London: Orion Children's, 2006.

MLA (9th ed.) Citation

Francesca Simon and Tony Ross. A Giant Slice of Horrid Henry. Orion Children's, 2006.