3R. M. Hare, Moral Thinking: Its Levels, Method, and Point, New York : Oxford University Press, 1981, pp. 26 - 43.
4R. M. Hare, "Ethical Theory and Utilitarianism", in Amartya Sen and Bernard Williams (eds.), Utilitarianism and Beyond, Cambridge, New York. Cambridge University Press, 1982,p. 35,p. 29.
5H. J. McCloskey, "A Non-Utilitarian Approach to Punishment", in Michael D. Bayles ( ed. ), Contemporary Utilitarianism, Gloucester, Mass. : Peter Smith, 1978, pp. 248 - 249.
6R. M. Hare, Essays on Political Morality, Oxford: Clarendon Press,1989 ,p. 214.
7Richard B. Brandt, "The Real and Alleged Problems of Utilitarianism" , The tlastings Center Report, Vol. 13, No. 2,1993 ,p. 38.
8Richard B. Brandt, Morality, Utilitarianism, and Rights, Cambridge : Cambridge University Press, 1992, p. 119.
9Robin Barrow, Utilitarianism : A Contemporary Statement, Hants : Edward Elgar Publishing Limited, 1991, p. 114,p. 115.
10William H. Shaw, Contemporary Ethics : Taking Account of Utilitarianism, Malden : Blackwell, 1999, p. 168.