Bolea Al Au. Applied leadership development nine elements of leadership mastery - London Routldege UK 2016 - xvi,312p. cm. - Leadership: research and practice series . ISBN: 9781138952065 (pbk) UKP 30.99 Standard No.: 33475 Source: 295, 10/03/2017, Classic Book Service Textual Subjects--Topical Terms: LEADERSHIP Dewey Class. No.: X:87, Q6