Buettner, D. (2017). The blue zones of happiness: Lessons from the world's happiest people. National Geographic.
Цитирование в стиле Чикаго (17-е изд.)Buettner, Dan. The Blue Zones of Happiness: Lessons from the World's Happiest People. Washington, D.C.: National Geographic, 2017.
Цитирование MLA (8-е изд.)Buettner, Dan. The Blue Zones of Happiness: Lessons from the World's Happiest People. National Geographic, 2017.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.