Adam Smith's System of Liberty, Wealth, and Virtue: The Moral and Political Foundations of The Wealth of Nations. : Oxford University Press, 1997-11-13. Oxford Scholarship Online. 2003-11-01. Date Accessed 20 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/0198292880.001.0001/acprof-9780198292883>.
(1997-11-13). Adam Smith's System of Liberty, Wealth, and Virtue: The Moral and Political Foundations of The Wealth of Nations. : Oxford University Press. Retrieved 20 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/0198292880.001.0001/acprof-9780198292883.
Adam Smith's System of Liberty, Wealth, and Virtue: The Moral and Political Foundations of The Wealth of Nations. : Oxford University Press, 1997-11-13. http://www.oxfordscholarship.com/view/10.1093/0198292880.001.0001/acprof-9780198292883.
Fitzgibbons A. Adam Smith's System of Liberty, Wealth, and Virtue: The Moral and Political Foundations of The Wealth of Nations. Oxford University Press; 1997. http://www.oxfordscholarship.com/view/10.1093/0198292880.001.0001/acprof-9780198292883. Accessed May 20, 2013.