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2. Susan Crawford: "The Origin and Development of a Concept: The Information Society
3. Tor Selstad (1990). "The rise of the quaternary sector. The regional dimension of wisdom or knowledge-based services in Norway, 1970–1985 - Norsk Geografisk Tidsskrift - Norwegian Journal of Geography - Volume 44, Issue 1"
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5. Machlup, Fritz (1962). The Production and Distribution of Knowledge in the United States . Princeton, NJ: Princeton University Press.
6. Drucker, P.F. (1969). The age of discontinuity: Guidelines to our changing society. New York, NY: Harper & Row
7. van Weert, T. J. (2006). Education of the twenty-first century: New professionalism in lifelong learning, knowledge development and knowledge sharing. Education and Information Technologies, 11(3), 217-237
8. Claudia Sarrocco (claudia.sarrocco@itu.int).”Elements and Principles of the Information Society”
9. Bamako 2002, art 2, and UN Millennium Declaration, UNGA Res. A/55/L.2 .Online at http://www.un.org/millennium/declaration/ares552e.htm.