1. Alston, W. (1967). Pleasure. In P. Edwards (Ed.), The encyclopedia of philosophy (pp. 341–347). New York: Macmillan Publishing Co. & The Free Press.
2. Broad, C. D. (1930). Five types of ethical theory. London: Routledge and Kegan Paul.
3. Carson, T. L. (2000). Value and the good life. Notre Dame, IN: University of Notre Dame Press.
4. Crisp, R. (2006). Reasons and the good. New York: Oxford University Press.
5. Davis, W. (1981). Pleasure and happiness. Philosophical Studies, 39, 305–317.