Achor, S. (2013). Before happiness: The 5 hidden keys to achieving success, spreading happiness, and sustaining positive change. Crown Business.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAchor, Shawn. Before Happiness: The 5 Hidden Keys to Achieving Success, Spreading Happiness, and Sustaining Positive Change. New York: Crown Business, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAchor, Shawn. Before Happiness: The 5 Hidden Keys to Achieving Success, Spreading Happiness, and Sustaining Positive Change. Crown Business, 2013.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.