References
Bennett, A., Cook, P., Miller, J., and Moore, D. (1987) The Complete Beyond the Fringe, Methuen.
Berlin, I. (1969) Four Essays on Liberty, Oxford University Press.
Warburton, N. (1999) Arguments for Freedom, Open University (A211 course book).
Warburton, N. (2000) Thinking from A to Z, Routledge (second edition).