APA (7th ed.) Citation

Dahl, R., & Quentin Blake. (1982). George's marvellous medicine. Puffin Books.

Chicago Style (17th ed.) Citation

Dahl, Roald, and Quentin Blake. George's Marvellous Medicine. New York: Puffin Books, 1982.

MLA (9th ed.) Citation

Dahl, Roald, and Quentin Blake. George's Marvellous Medicine. Puffin Books, 1982.

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