Rauch, J. (2018). The happiness curve: Why life gets better after 50 (First edition.). A Thomas Dunne Book, St. Martin's Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRauch, Jonathan. The Happiness Curve: Why Life Gets Better After 50. First edition. New York: A Thomas Dunne Book, St. Martin's Press, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRauch, Jonathan. The Happiness Curve: Why Life Gets Better After 50. First edition. A Thomas Dunne Book, St. Martin's Press, 2018.
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