2R. G. Peffer, Marxism, Morality, and Social Justice, New Jersey: Princeton University Press, 1990, p. 3 ,p. 6,p. 5 ,p. 51, p. 14, p. 14,p. 434,pp. 437-438,pp. 29 -30, pp. 31 -32,chapter 1,p. 116, pp. 116 - 117.
3Peffer,Marxisrn, Morality, and Social Justice, p. 13.
4Lawrence Wilde, "Introduction" to Marxism's Ethical Thinkers, ed. Lawrence Wilde,Hampshire: Palgrave, 2001, pp. 1 -6,p. 6,pp. 3 -4.
5Marxism,Morality, and Social Justice, chapters 4 - 7.
6Marshall Cohen, Thomas Nagel, and Thomas Scanlon, eds. Marx, Justice,and History, New Jersey. Princeton University Press, 1980, p. vii.