1. Mosca, The Ruling Class, New York, 1959, pp. 65–66.
2. Pareto, The Mind and Society: A Treatise on General Sociology, New York, 1935, 3: 1430–31.
3. Selznik, TVA and the Grassroots, Berkeley, 1949, p. 259.
4. Weber, The Theory of Social and Economic Organization, trans. A. M. Henderson and Talcott Parsons, ed. Talcott Parsons, London, 1947, pp. 329–30.
5. Armstrong, The European Administrative Elite, Princeton, 1973.