Dyfyniad APA

Levitt, S. D., & Dubner, S. J. (2005). FREAKONOMICS: A Rogue Economist Explores the Hidden Side of Everything. William Morrow.

Dyfyniad Arddull Chicago

Levitt, Steven D., and Stephen J. Dubner. FREAKONOMICS: A Rogue Economist Explores the Hidden Side of Everything. New York: William Morrow, 2005.

Dyfyniad MLA

Levitt, Steven D., and Stephen J. Dubner. FREAKONOMICS: A Rogue Economist Explores the Hidden Side of Everything. William Morrow, 2005.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.