Norville, D. (2008). Thank you power: Making the science of gratitude work for you. BBC Audiobooks America.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNorville, Deborah. Thank You Power: Making the Science of Gratitude Work for You. [S.l.]: BBC Audiobooks America, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNorville, Deborah. Thank You Power: Making the Science of Gratitude Work for You. BBC Audiobooks America, 2008.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.