2
by Drucker, Peter F.
Published 2001
HarperBusiness

4
by Edersheim, Elizabeth Haas
Published 2007
McGraw-Hill

5
by Drucker, Peter F., Wartzman, Rick
Published 2010
McGraw Hill-Ascent Audio

6
by Drucker, Peter F.
Published 2010
McGraw-Hill

7
by Drucker, Peter F.
Published 2014
HarperBusiness

9
by Cohen, William A.
Published 2008
AMACOM/ American Management Association