Gaarder, J. (1996). Sophie's world: A novel about the history of philosophy / Jostein Gaarder ; translated by Paulette Møller (37. ed.). Phoenix.

Gaarder, Jostein. Sophie's World: A Novel About the History of Philosophy / Jostein Gaarder ; Translated by Paulette Møller. 37. ed. London: Phoenix, 1996.

Gaarder, Jostein. Sophie's World: A Novel About the History of Philosophy / Jostein Gaarder ; Translated by Paulette Møller. 37. ed. Phoenix, 1996.