Cita APA (7th ed.)

Levitt, S. D., & Dubner, S. J. (2009). Freakonomics: A Rogue Economist Explores the Hidden Side of Everything. Harper Perennial.

Cita Chicago (17th ed.)

Levitt, Steven D., i Stephen J. Dubner. Freakonomics: A Rogue Economist Explores the Hidden Side of Everything. New York: Harper Perennial, 2009.

Cita MLA (9th ed.)

Levitt, Steven D., i Stephen J. Dubner. Freakonomics: A Rogue Economist Explores the Hidden Side of Everything. Harper Perennial, 2009.