1. Campbell, R. H., and Skinner, A. S. ‘General Introduction’ to Adam Smith, The Wealth of Nations, ed. R. H. Campbell, A. S. Skinner and W. B. Todd (Oxford: Oxford University Press, 1976).
2. Liberty in Hume’s History of England
3. Forbes, Duncan, ‘Introduction’ to David Hume, The History of Great Britain (Harmondsworth: Penguin, 1970).
4. Forbes, Duncan, ‘Sceptical Whiggism, Commerce, and Liberty’, in Essays on Adam Smith, ed. Andrew S. Skinner and Thomas Wilson (Oxford: Oxford University Press, 1975), 179–201.
5. Forbes, Duncan, Hume's Philosophical Politics (Cambridge: Cambridge University Press, 1975).