APA Citation

Gaarder, & Moller. (2007). Sophie's world: A novel about the history of philosophy. New York: Farrar, Straus and Giroux.

Chicago Style Citation

Gaarder, and Moller. Sophie's World: A Novel About the History of Philosophy. New York: Farrar, Straus and Giroux, 2007.

MLA Citation

Gaarder, and Moller. Sophie's World: A Novel About the History of Philosophy. New York: Farrar, Straus and Giroux, 2007.

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