Ritically discuss the view that in modern states, political power is concentrated in an elite group.

All these books need to be used in order for me to pass! I need good references.
Harvard style.

Raphael C.(1976) Problems in Political Philosophy Macmillan
Wright-Mills C.(1965) The Power Elite
Ball A. (1994) op cit

Hoffman J. (1988) ibid.
Leftwich A. (ed) (2004) op cit
Lukes, S. (2005) Power: a Radical View second edition, Palgrave.
Barry N.(1989) An Introduction to Modern Political Theory Macmillan
McLennan G. (1989) Marxism, Pluralism and Beyond, Polity
Parry G. (1978) Political Elites Basil Blackwell
Pateman C.(1970) Participation in Democratic Theory, OUP