Polard, A. F. (2012). A unified theory of happiness: An East-meets-West approach to fully loving your life. Sounds True.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPolard, Andrea F. A Unified Theory of Happiness: An East-meets-West Approach to Fully Loving Your Life. Boulder, CO: Sounds True, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPolard, Andrea F. A Unified Theory of Happiness: An East-meets-West Approach to Fully Loving Your Life. Sounds True, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.