Covey, S. R. The 7 habits of highly effective people: Restoring the character ethic (Revised edition.).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.