6.John Robertson, The Enlightenment: A Very Short Introduction, Oxford University Press, 2015.
7. David A. Baldwin(ed.), Neorealism and Neoliberalism: The Contemporary Debate, Columbia University Press,1993, pp.106-107.
8. Samuel Fleischacker, “Adam Smith on Equality", in Christopher J.Berry,Maria Pia Paganelliand Craig Smith(eds.), The Oxford Handbook of Adam Smith,Oxford University Press, 2013.