Cita APA

Gaarder, J. 1. (1997). Sophie's world: A novel about the history of philosophy ([14th. ed.].). London: Phoenix.

Citación estilo Chicago

Gaarder, Jostein 1952-. Sophie's World: A Novel About the History of Philosophy. [14th. ed.]. London: Phoenix, 1997.

Cita MLA

Gaarder, Jostein 1952-. Sophie's World: A Novel About the History of Philosophy. [14th. ed.]. London: Phoenix, 1997.