Covey, S. R., & Collins, J. C. (2020). The 7 habits of highly effective people: Powerful lessons in personal change (Revised and updated.). Simon & Schuster.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCovey, Stephen R., और James C. Collins. The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change. Revised and updated. New York: Simon & Schuster, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCovey, Stephen R., और James C. Collins. The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change. Revised and updated. Simon & Schuster, 2020.
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