Adam Smith (1843). “An Inquiry Into the Nature and Causes of the Wealth of Nations With a Life of the Author: Also a View of the Doctrine of Smith, Compared with that of the French Economists, with a Method of Facilitating the Study of His Works, from the French of M. Jariner”, p.177
Adam Smith (1817). “An inquiry into the nature and causes of the wealth of nations0: With a life of the author : Also a view of the doctrine of Smith, compared with that of the french economists ...”, p.19
Adam Smith (2007). “The Wealth of Nations: An Inquiry Into the Nature and Causes of the Wealth of Nations: With an introduction by Jonathan B. Wight, University of Richmond”, p.393, Harriman House Limited