1. Maslow, A.H., Motivation and Personality, 2nd ed., Harper and Row,New York, 1960, cited in Johns, G.Organizational Behavior: Understanding Life at Work,2nd ed.Foresman and Company, Glenview, Illinois, 1988, pp.155-157.
2. McGregor, D., The Human Side ofEnterprise, McGraw-Hill,New York 1960, cited in Johns, G.Organizational Behavior: Understanding Life at Work,2nd ed., Scott,Foresman and Company, Glenview, Illinois, 1988, pp.149-150.