APA (7th ed.) Citation

Cowell, C. (2005). There's no such thing as a ghostie! Penguin Books.

Chicago Style (17th ed.) Citation

Cowell, Cressida. There's No Such Thing as a Ghostie! London: Penguin Books, 2005.

MLA (9th ed.) Citation

Cowell, Cressida. There's No Such Thing as a Ghostie! Penguin Books, 2005.