Watkins Alan 4D leadership Competitive advantage through vertical leadership development - London Kogen Page UK 2016 - vii, 239p. cm. ISBN: 9780749474645 (pbk) 1930.82 Standard No.: 25971 Source: 1273, 22/03/2016, Selectbook Service Syndicate Textual Subjects--Topical Terms: ECONOMICS Dewey Class. No.: X:87, Q6