APA (7th ed.) Citation

Simon, F., & McAleenan, K. (2000). Don't be horrid, Henry! Orion Children's.

Chicago Style (17th ed.) Citation

Simon, Francesca, and Kevi McAleenan. Don't Be Horrid, Henry! London: Orion Children's, 2000.

MLA (8th ed.) Citation

Simon, Francesca, and Kevi McAleenan. Don't Be Horrid, Henry! Orion Children's, 2000.