Buettner, D. (2012). The Blue Zones: 9 lessons for living longer from the people who've lived the longest (Second edition.). National Geographic.
Cita Chicago Style (17a ed.)Buettner, Dan. The Blue Zones: 9 Lessons for Living Longer from the People Who've Lived the Longest. Second edition. Washington, D.C.: National Geographic, 2012.
Cita MLA (8a ed.)Buettner, Dan. The Blue Zones: 9 Lessons for Living Longer from the People Who've Lived the Longest. Second edition. National Geographic, 2012.
Precaución: Estas citas no son 100% exactas.