APA (7th ed.) Citation

Gray, K., & Jim Field. (2015). Oi Frog! Hodder Children's Books.

Chicago Style (17th ed.) Citation

Gray, Kes, and Jim Field. Oi Frog! London: Hodder Children's Books, 2015.

MLA (9th ed.) Citation

Gray, Kes, and Jim Field. Oi Frog! Hodder Children's Books, 2015.