Berlin, I. The Hedgehog and the Fox. Chicago: Elephant Paperbacks, 1993.
Collins, J. Good To Great: Why Some Companies Make the Leap…and Others Don't. New York: HarperCollins Publishers, 2001.
Costa, P. T., Jr., and R. R. McCrae. NEO PI-R Professional Manual. Odessa, FL: Psychological Assessment Resources, 1992.
Dewey, J. “How We Think: A Restatement of the Relation of Reflective Thinking to the Educative Process.” John Dewey: The Later Works, 1925–1953, J. A. Boydston, editor. Carbondale, IL: Southern University Press, 1986.
_______. Experience and Nature. New York: Dover Publications, 1958.
Diamond, M. C. Magic Trees of the Mind ...