APA (7th ed.) Citation

Dahl, R., & Blake, Q. (2007). Charlie and the great glass elevator. Puffin Books.

Chicago Style (17th ed.) Citation

Dahl, Roald, and Quentin Blake. Charlie and the Great Glass Elevator. New York: Puffin Books, 2007.

MLA (8th ed.) Citation

Dahl, Roald, and Quentin Blake. Charlie and the Great Glass Elevator. Puffin Books, 2007.

Warning: These citations may not always be 100% accurate.