Gaya APA

Levitt, S, D., Dubner, S, J. (2005). Freakonomics: a rogue economist explores the hidden side of everything (Edisi Revisi). New York: HarperCollins.

Gaya MLA

Levitt, Steven, D.., Dubner, Stephen, J.. "Freakonomics: a rogue economist explores the hidden side of everything". Edisi Revisi New York: HarperCollins, 2005. Text.