Koontz, Harold. Essentials of Management : An International and Leadership Perspective / Harold Koontz; Heinz Weihrich. - 9th ed. - New Delhi: McGraw Hill Education, 2012. - xii 500 p.: ill.; 23 cm. Subject Index. ISBN: 9781259005121 Subjects--Topical Terms: Management. Dewey Class. No.: 658 / KOO-E 2012 806831