APA Style

Gaarder, J., Moller, P. (2007). Sophie's World: A Novel About the History of Philosophy (Reprint Ed.). : Farrar, Straus and Giroux.

MLA Style

Gaarder, Jostein., Moller, Paulette. "Sophie's World: A Novel About the History of Philosophy". Reprint Ed. : Farrar, Straus and Giroux, 2007. Text.