APA Style

Levitt, S, D., Dubner, S, D. (2006). Freakonomics : A Rogue Economist, Explores The Hidden, Side of Everything . London: Penguin Books.

MLA Style

Levitt, Steven, D.., Dubner, Stephen, D.. "Freakonomics : A Rogue Economist, Explores The Hidden, Side of Everything". London: Penguin Books, 2006. Text.