APA (7th ed.) Citation

Horsley, L., & Petrone, V. My mum is mad. Ladybird Books.

Chicago Style (17th ed.) Citation

Horsley, Lorraine, and Valeria Petrone. My Mum Is Mad. London: Ladybird Books.

MLA (9th ed.) Citation

Horsley, Lorraine, and Valeria Petrone. My Mum Is Mad. Ladybird Books.