Buettner, D. (2012). The Blue Zones: 9 lessons for living longer from the people who've lived the longest (Second edition.). National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBuettner, 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.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBuettner, Dan. The Blue Zones: 9 Lessons for Living Longer from the People Who've Lived the Longest. Second edition. National Geographic, 2012.
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