Hughes, Richard L. Leadership : enhancing the lessons of experience / Richard L. Hughes, Robert C. Ginnett, Gordon J. Curphy. - 7th ed. (Int. ed.) - New York : McGraw-Hill, c2012. - xviii, 716 p. : ill. ; 23 cm. Includes index. ISBN: 9780071086547 (pbk.) Subjects--Topical Terms: Leadership.