APA (7th ed.) Citation

Simon, F., & Ross, T. (2009). Horrid Henry and the mega-mean time machine. Sourcebooks.

Chicago Style (17th ed.) Citation

Simon, Francesca, and Tony Ross. Horrid Henry and the Mega-mean Time Machine. Naperville, Ill.: Sourcebooks, 2009.

MLA (8th ed.) Citation

Simon, Francesca, and Tony Ross. Horrid Henry and the Mega-mean Time Machine. Sourcebooks, 2009.

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