[Drucker 1957] Peter Drucker, Landmarks of Tomorrow: A Report on the New Post-Modern World (New York: Harper & Row, 1957).
[Drucker 1969] Peter Drucker, The Age of Discontinuity (New York: Harper & Row, 1969).
[Drucker 1997] Peter Drucker, "The Future Has Already Happened," Harvard Business Review 75, no. 5 (September–October 1997): 20–23.
[Economist 2009] "Taking Flight," The Economist, September 17, 2009.
[Friedman 2005] Thomas L. Friedman, The World Is Flat: A Brief History of the Twenty-first Century (New York: Farrar, Straus and Giroux, 2005).
[Schumpeter 1942] Joseph Schumpeter, Capitalism, Socialism and Democracy (New York: Harper & Row, 1975 [orig. pub. 1942]).
[Terleckyj 1999] Nestor E. Terleckyj, "Measuring Contribution of Small Business to Industry Job Growth by Data in Business Association Directories," U.S. Small Business Administration Report for Project SBAHQ-97-M-0753, April 30, 1999.