APA (7th ed.) Citation

London, J. (2004). Froggy goes to the doctor. Puffin Books.

Chicago Style (17th ed.) Citation

London, Jonathan. Froggy Goes to the Doctor. New York: Puffin Books, 2004.

MLA (9th ed.) Citation

London, Jonathan. Froggy Goes to the Doctor. Puffin Books, 2004.