APA (7th ed.) Citation

Gaarder, J., & translated by Paulette Moller. (2004). Sophie's world: Novel about the history of philosophy. Farrar.

Chicago Style (17th ed.) Citation

Gaarder, Jostein, and translated by Paulette Moller. Sophie's World: Novel About the History of Philosophy. New York: Farrar, 2004.

MLA (9th ed.) Citation

Gaarder, Jostein, and translated by Paulette Moller. Sophie's World: Novel About the History of Philosophy. Farrar, 2004.