COVEY, S. R. (1990). The 7 habits of higly effective people: Powerful lessonin personal change. A Fireside Book.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCOVEY, Stephen R. The 7 Habits of Higly Effective People: Powerful Lessonin Personal Change. New York: A Fireside Book, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCOVEY, Stephen R. The 7 Habits of Higly Effective People: Powerful Lessonin Personal Change. A Fireside Book, 1990.
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