Covey, S. R. (2004). The 8th habit: From effectiveness to greatness. Free Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. The 8th Habit: From Effectiveness to Greatness. New York: Free Press, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. The 8th Habit: From Effectiveness to Greatness. Free Press, 2004.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.