Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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

Precaución: Estas citas no son 100% exactas.