APA (7th ed.) Citation

Francesca Simon & Tony Ross. (2012). Horrid Henry's Sports Day. Orion Children's Books.

Chicago Style (17th ed.) Citation

Francesca Simon and Tony Ross. Horrid Henry's Sports Day. London: Orion Children's Books, 2012.

MLA (9th ed.) Citation

Francesca Simon and Tony Ross. Horrid Henry's Sports Day. Orion Children's Books, 2012.

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