Gaya APA

Gaarder, J. (1995). Sophie's world: A novel about the history of philosophy. Transl. by Paulette Moller. : Sofies verden. 1991 . London: London Phoenix.

Gaya MLA

Gaarder, Jostein. "Sophie's world: A novel about the history of philosophy. Transl. by Paulette Moller. : Sofies verden. 1991 ". London: London Phoenix, 1995. Buku.