Marx. Marxist Internet Archive.; 2007. Abstract
Marx, Nicolaus, Martin. Grundrisse : foundations of the critique of political economy (rough draft). London; New York: Penguin Books in association with New LLeft Review; 1993. (Penguin classics).
Marx, Fernbach D. Capital : a critique of political economy. Vol. 2. London: Penguin Books in association with New Left Review; 1992.
Marx, Fowkes B, Fernbach D. Capital : a critique of political economy. London; New York, N.Y.: Penguin Books in association with New Left Review; 1981.