Cita APA (7th ed.)

Gaarder Jostein. (2015). Sophies World. Weindenfuld.

Cita Chicago (17th ed.)

Gaarder Jostein. Sophies World. New York: Weindenfuld, 2015.

Cita MLA (9th ed.)

Gaarder Jostein. Sophies World. Weindenfuld, 2015.