Campbell, D.T. (1974) Qualitative Knowing in Action Research, Kurt Lewin Award Address, New York, Annual Meeting of the American Psychological Association.
2.
Clark, A.W. (Ed.), (1976), Experimenting with Organizational Life: The Action Research Approach, New York, Plenum.
3.
Cook, T.D., and Campbell, D.T. (1979), Quasi-Experimentation: Design for Analysis issues for field Settings, Chicago, Rand McNally.
4.
Hammond, P.E. (Ed.), (1964), Sociologists at Work: Essays on the Craft of Social Research, New York , Basic Books.
