1. Jerka Pekka Roos, “Welfare State and Social Policy: A Study in Policy Science.” In Commentationes Scientiarum Socialium. Helsinki: The Finnish Scientific Society, 1973. Pp. 212–25.
2. Carol H. Weiss, ed., Using Social Research in Public Policy Making. Lexington, Mass.: Lexington Books, 1977.
3. Robert Redfield, The Social Uses of Social Science: The Papers of Robert Redfield, edited by M. P. Redfield. Chicago: University of Chicago Press, 1963. Vol. 2, p. 193.
4. Carol Weiss, “The Challenge of Social Research to Decision Making.” In Carol Weiss, ed., Op. cit. P. 213.
5. Charles A. Lindblom and David K. Cohen, Usable Knowledge: Social Science and Social Problem Solving. New Haven: Yale University Press, 1979.