APA (7th ed.) Citation

(2018). Happiness hacks: 300+ simple ways to get and stay happy. Adams Media.

Chicago Style (17th ed.) Citation

Happiness Hacks: 300+ Simple Ways to Get and Stay Happy. Avon, MA: Adams Media, 2018.

MLA (9th ed.) Citation

Happiness Hacks: 300+ Simple Ways to Get and Stay Happy. Adams Media, 2018.

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