↑ Mehring, Franz, Karl Marx: The Story of His Life (Routledge, 2003) pg. 75
↑ John Bellamy Foster. "Marx's Theory of Metabolic Rift: Classical Foundations for Environmental Sociology", American Journal of Sociology, Vol. 105, No. 2 (September 1999), pp. 366–405.
↑ Roberto Mangabeira Unger. Free Trade Reimagined: The World Division of Labor and the Method of Economics. Princeton: Princeton University Press, 2007.
↑ John Hicks, "Capital Controversies: Ancient and Modern." The American Economic Review 64.2 (May 1974) p. 307: "The greatest economists, Smith or Marx or Keynes, have changed the course of history ..."
↑ Joseph Schumpeter Ten Great Economists: From Marx to Keynes. Volume 26 of Unwin University books. Edition 4, Taylor & Francis Group, 1952 ISBN0415110785, 9780415110785
↑ Kim, Sung Ho (2017). Zalta, Edward N., ed. "Max Weber". Metaphysics Research Lab, Stanford University. สืบค้นเมื่อ 10 December 2017. Max Weber is known as a principal architect of modern social science along with Karl Marx and Emil Durkheim.
Daniel Little, The Scientific Marx, University of Minnesota Press (1986) , trade paperback, 244 pages, ISBN 0-8166-1505-5 (Marx's work considered as science)
Francis Wheen, Karl Marx, Fourth Estate (1999) , ISBN 1-85702-637-3 (biography of Marx)
