1. Stevens R. Systems engineering: coping with complexity. Prentice-Hall, Englewood Cliffs, NJ, 1998 (a modern industrial perspective on systems)
2. Mumford E. Systems design: ethical tools for ethical change. Macmillan, New York, 1996 (an intelligent and reflective text on systems engineering in its social context)
3. Standish Group. Web site at http://www.standishgroup.com, 1998 (a corporate view of the cost of poor systems development)
4. Heron J. Co-operative inquiry: research into the human condition. Sage, Newbury Park, CA, 1996 (a recent text by one of the founders of CI, with detailed examples and discussion)
5. Reason P. Participation in human inquiry. Sage, Newbury Park, CA, 1994 (a textbook by one of the founders of CI with an academic slant)