Covey, S. R. (2006). The 8th habit personal workbook (1st Free Press trade pbk. ed.). Free Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. The 8th Habit Personal Workbook. 1st Free Press trade pbk. ed. New York: Free Press, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. The 8th Habit Personal Workbook. 1st Free Press trade pbk. ed. Free Press, 2006.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.