00742nam a22002417a 4500 20210325211203.0 s2012 eng d 9780470651728 eng HD57.7 K68L 2012 Posner, Barry Z. The leadership challenge : how to make extraordinary things happen in organizations [5th] San Francisco, CA : Jossey-Bass, 2012 394 p. ; 24 cm. Management Executive ability Leadership NALT GB 9772 000000000068169 นางสุกัญญา กัลยา 68169 68169