References

Herzberg, Frederick, Bernard Mausner, and Barbara Bloch Snyderman. 1959. The Motivation to Work. New York: John Wiley & Sons.

Maslow, Abraham H. 1943. “A Theory of Human Motivation.” Psychological Review 50 (4): 370–96.

McClelland, David C. 1961. The Achieving Society. Princeton, NJ: Van Nostrand.

McGregor, Douglas. 1960. The Human Side of Enterprise. New York: McGraw-Hill.