1. Ackoff, R.L. (1969). “Institutional Functions and Societal Needs.” Perspectives in Planning, 495–500.
2. Ackoff, R.L. and Churchman, W.C. (1950). “Purposive Behavior and Cybernetics.” In: Social Forces 29: 32–39.
3. Alexander, E.R. (1986). Approaches to Planning: Introducing Current Planning Theories, Concepts and Issues. New York, Gordon and Breach.
4. Alexander Ernest, R. (1998). Rationality Revisited: Planning Paradigms in a Post-postmodernist Perspective. Planning Theory Conference, Oxford Brookes University, 2–4 April, School of Planning.
5. Allison, Michael and Kaye, J. (1997). Strategic Planning for Nonprofit Organizations: A Practical Guide and Workbook. New York, Wiley.