APA (7th ed.) Citation

RICARD. (2006). Happiness: A guide to developing life's most important skill. Little Brown.

Chicago Style (17th ed.) Citation

RICARD. Happiness: A Guide to Developing Life's Most Important Skill. New York: Little Brown, 2006.

MLA (9th ed.) Citation

RICARD. Happiness: A Guide to Developing Life's Most Important Skill. Little Brown, 2006.

Warning: These citations may not always be 100% accurate.