Cita APA (7a ed.)

Freeman, D., & Freeman, J. (2012). You can be happy: The scientifically proven way to change how you feel (1st edition.). Pearson Education Limited.

Cita Chicago Style (17a ed.)

Freeman, Daniel, y Jason Freeman. You Can Be Happy: The Scientifically Proven Way to Change How You Feel. 1st edition. Harlow, England: Pearson Education Limited, 2012.

Cita MLA (9a ed.)

Freeman, Daniel, y Jason Freeman. You Can Be Happy: The Scientifically Proven Way to Change How You Feel. 1st edition. Pearson Education Limited, 2012.