Chosen at random from all the resources listed:
- Advanced Systems Thinking, Engineering, and Management by Derek K. Hitchins
- UML for Systems Engineering by Jon Holt
- Systems Thinking, Systems Practice (30 Year Retrospective) by Peter B. Checkland
- When a Butterfly Sneezes: A Guide for Helping Kids Explore Interconnections in Our World ... by Linda Booth Sweeney
- Putting Systems to Work by Derek K. Hitchins