Cita APA (7a ed.)

Ridley, M. (2011). The rational optimist: How prosperity evolves (First Harper Perennial edition published 2011.). Harper Perennial.

Cita Chicago Style (17a ed.)

Ridley, Matt. The Rational Optimist: How Prosperity Evolves. First Harper Perennial edition published 2011. New York [etc.]: Harper Perennial, 2011.

Cita MLA (9a ed.)

Ridley, Matt. The Rational Optimist: How Prosperity Evolves. First Harper Perennial edition published 2011. Harper Perennial, 2011.