Gaya APA

Levitt, S, D., Dubner, S, J. (2009). Freakonomics: a rogue economist explores the hidden side of everything . nyu: .

Gaya MLA

Levitt, Steven, D.., Dubner, Stephen, J.. "Freakonomics: a rogue economist explores the hidden side of everything". nyu: , 2009. print.