कवी, स्टीफन आर = Covey, Stephen R अति प्रभावकारी लोगों की 7 आदतें = 7 Habits of Highly Effective People - New Delhi: Manjul; 2020. - 481p. ISBN: 9788186775998 Subjects--Topical Terms: Self-management (Psychology) Dewey Class. No.: 158.1 COV