1. Adam Smith, The Wealth of Nations (1776) vol. II, Book iv, Chapter 7, part iii.
2. Adam Smith, The Wealth of Nations (1776).
3. Adam Smith, Theory of Moral Sentiments (1759), ed. D. D. Raphael and A. L. Macfie (Oxford, 1976) p. 77.
4. Philip Sidney, A Defence of Poesie (1591), ed. J. A. Van Dorsten (Oxford, 1966).
5. Ibid.