Gaarder, J., & Moller, P. (1996). Sophie's world: A novel about the history of philosophy. Phoenix.
Lua i Stíl Chicago (17ú heag.)Gaarder, Jostein, agus Paulette Moller. Sophie's World: A Novel About the History of Philosophy. London: Phoenix, 1996.
Lua MLA (9ú heag.)Gaarder, Jostein, agus Paulette Moller. Sophie's World: A Novel About the History of Philosophy. Phoenix, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.