APA Style

Levitt, S, D, D, S, J. (2006). Freakonomics: a rogue economist explores the hidden side of everytinh: the internatinational bestseller . London: Penguin books.

MLA Style

Levitt, Steven, D;, Dubner,, Stephen, J.. "Freakonomics: a rogue economist explores the hidden side of everytinh: the internatinational bestseller". London: Penguin books, 2006. Text.