APA (7th ed.) Citation

Gaarder,Jostein. (1996). Sophie's World: A Novel About The History Of Philosophy. Berkley Books.

Chicago Style (17th ed.) Citation

Gaarder,Jostein. Sophie's World: A Novel About The History Of Philosophy. New York: Berkley Books, 1996.

MLA (9th ed.) Citation

Gaarder,Jostein. Sophie's World: A Novel About The History Of Philosophy. Berkley Books, 1996.

Warning: These citations may not always be 100% accurate.