APA (7th ed.) Citation

Buettner, D. (2017). The blue zones of happiness: Lessons from the world's happiest people. National Geographic.

Chicago Style (17th ed.) Citation

Buettner, Dan. The Blue Zones of Happiness: Lessons from the World's Happiest People. Washington, D.C: National Geographic, 2017.

MLA (9th ed.) Citation

Buettner, Dan. The Blue Zones of Happiness: Lessons from the World's Happiest People. National Geographic, 2017.