APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Freeman, Daniel, and Jason Freeman. You Can Be Happy: The Scientifically Proven Way to Change How You Feel. New York: Pearson, 2012.

MLA (8th ed.) Citation

Freeman, Daniel, and Jason Freeman. You Can Be Happy: The Scientifically Proven Way to Change How You Feel. Pearson, 2012.