APA (7th ed.) Citation

Dahl, R., & Blake, Q. (2004). Charlie and the chocolate factory. Puffin Books.

Chicago Style (17th ed.) Citation

Dahl, Roald, and Quentin Blake. Charlie and the Chocolate Factory. London: Puffin Books, 2004.

MLA (9th ed.) Citation

Dahl, Roald, and Quentin Blake. Charlie and the Chocolate Factory. Puffin Books, 2004.