Covey, S. R. (2004). 8th Habit from effectiveness to greatness (Audio Book). Simon & Schuster Inc.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. 8th Habit from Effectiveness to Greatness (Audio Book). New York: Simon & Schuster Inc, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. 8th Habit from Effectiveness to Greatness (Audio Book). Simon & Schuster Inc, 2004.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.