Covey, S. R. (2009). The 7 habits of highly effective people.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. The 7 Habits of Highly Effective People. 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCovey, Stephen R. The 7 Habits of Highly Effective People. 2009.
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