Chosen at random from all the resources listed:
- Systems Thinking, Systems Practice (30 Year Retrospective) by Peter B. Checkland
- Thinking in Systems: A Primer by Donella H Meadows
- MSc Business and Systems Thinking (incorporating PG Cert/PG Dip) by -- Uknown -- -- Uknown --
- System Requirements Analysis by Jeffrey O Grady
- Advanced Systems Thinking, Engineering, and Management by Derek K. Hitchins