TY - BOOK AU - Drucker, Peter F. TI - Management challenges for the 21st century PY - 1999/// CY - New YorkUS PB - Harper Business N2 - Identifies changes in areas including: demographics, politics, society, philosophy, economics; and stresses the need for appropriate strategic planning. Examines topics such as: the tasks of the change leader and, information challenges. Advises workers to manage themselves in various areas including: their strengths, performance, learning styles, values, contribution and relationships ER -