Dyfyniad APA

Levitt, S. D., & Dubner, S. J. (2005). Freakonomics: A rogue economist explores the hidden side of everything (First edition & revised and expanded edition.). William Morrow.

Dyfyniad Arddull Chicago

Levitt, Steven D., and Stephen J. Dubner. Freakonomics: A Rogue Economist Explores the Hidden Side of Everything. First edition & revised and expanded edition. New York: William Morrow, 2005.

Dyfyniad MLA

Levitt, Steven D., and Stephen J. Dubner. Freakonomics: A Rogue Economist Explores the Hidden Side of Everything. First edition & revised and expanded edition. William Morrow, 2005.

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