APA (7th ed.) Citation

Dahl, R., & Blake, Q. (2013). Charlie and the great glass elevator. Puffin Books.

Chicago Style (17th ed.) Citation

Dahl, Roald, and Quentin Blake. Charlie and the Great Glass Elevator. London: Puffin Books, 2013.

MLA (9th ed.) Citation

Dahl, Roald, and Quentin Blake. Charlie and the Great Glass Elevator. Puffin Books, 2013.