REFERENCES
- Berlin , Isaiah . 1969 . Four Essays on Liberty , Oxford : Oxford University Press .
- Gray , Timothy . 1991 . Freedom , London : Macmillan .
- Hunt , Ian . 1991 . Freedom and Its Conditions . Australasian Journal of Philosophy , 69 : 288 – 301 .
- Levin , M. 1984 . Negative Liberty . Social Philosophy and Policy , 2 : 84 – 100 .