1. Ludwig von Bertalanffy, General Systems Theory: Foundations, Development, Application (New York: G. Braziller, 1969).
2. Talcott Parsons, The Social System (Glencoe, IL: Free Press, 1951);
3. Kenneth Boulding, The Social System of the Planet Earth (Reading, MA: Addison-Wesley, 1980).
4. See, for example, Danny Burns, Systemic Action Research: A Strategy for Whole System Change (Bristol, UK: Policy Press, 2007);
5. William Pasmore, Designing Effective Organizations: The Sociotechnical Systems Perspective (New York: Wiley, 1988);