Cantril, H. (1965) The Pattern of Human Concerns. New Brunswick, N.J.: Rutgers Univ. Press.
2.
Hazlewood, L.A. (1967) "Community cleavage and action for change." University of Pennsylvania Political Science Department, Philadelphia. (unpublished)
3.
International Studies of Values in Politics (I.S.V.I.P.) (1971) Values and the Active Community. New York: Free Press.
4.
Jacob, P.E. (1971) "The limits of value consensus." International Studies Q.15 (June): 203-220.