Gaya APA

Levitt, S, D., Dubner, S, J. (2009). Freakonomics: A rogue economist explores the hidden side of everything (edisi revisi, includes new material). New York, USA: Harper.

Gaya MLA

Levitt, Steven, D.., Dubner, Stephen, J.. "Freakonomics: A rogue economist explores the hidden side of everything". edisi revisi, includes new material New York, USA: Harper, 2009. Text.