Wartzman, R. (2012). What would Drucker do now: Solutions to today's toughest challenges from the father of modern management. McGraw-Hill.
Chicago-referens (17:e uppl.)Wartzman, Rick. What Would Drucker Do Now: Solutions to Today's Toughest Challenges from the Father of Modern Management. New York, NY: McGraw-Hill, 2012.
MLA-referens (9:e uppl.)Wartzman, Rick. What Would Drucker Do Now: Solutions to Today's Toughest Challenges from the Father of Modern Management. McGraw-Hill, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.