APA (7th ed.) Citation

Francesca Simon & Ross, T. (2011). A greedy gulp of Horrid Henry. Orion Children's Books.

Chicago Style (17th ed.) Citation

Francesca Simon and Tony Ross. A Greedy Gulp of Horrid Henry. London: Orion Children's Books, 2011.

MLA (9th ed.) Citation

Francesca Simon and Tony Ross. A Greedy Gulp of Horrid Henry. Orion Children's Books, 2011.

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