Ackoff, Russell L. and Fred E. Emery
[1972]  On Purposeful Systems, Tavistock Publications, London


Chadwick, George
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Hoc, Jean-Michel
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Kast, Fremont E. and James E. Rosenzweig
[1970]  Organization and Management, McGraw-Hill, Third Edition, 1979


McLoughlin, J. Brian
[1969]  Urban and Regional Planning. A Systems Approach, Faber, London, 1973


Simon, Herbert A.
[1945]  Administrative Behavior, The Free Press, New York, Second Edition, 1965