Dyfyniad APA

Gaarder, J. (1996). Sophie's world: A novel about the history of philosophy. Penguin Group.

Dyfyniad Arddull Chicago

Gaarder, Jostein. Sophie's World: A Novel About the History of Philosophy. New York: Penguin Group, 1996.

Dyfyniad MLA

Gaarder, Jostein. Sophie's World: A Novel About the History of Philosophy. Penguin Group, 1996.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.