References
- Cohen , G. A. 1978 . Karl Marx's Theory of History: A Defence , : 47 Oxford
- Cohen , G. A. 1978 . Karl Marx's Theory of History: A Defence , : 113 Oxford
- McMurtry , J. 1978 . The Structure of Marx's World View , : 188 Princeton
- Rigby , S. H. 1987 . Marxism and History: A Critical Introduction Manchester
- Rader , M. 1979 . Marx's Interpretation of History especially chapter 2.