APA (7th ed.) Citation

Dahl, R., & Blake, Q. (1998). 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, 1998.

MLA (9th ed.) Citation

Dahl, Roald, and Quentin Blake. Charlie and the Great Glass Elevator. Puffin Books, 1998.