Economic theorists: David Ricardo
- About the life and studies of David Ricardo. From the economy professor site.
- http://cepa.newschool.edu/het/profiles/ricardo.htm

Ricardo on value: the three chapter ones
- All three versions of the heavily revised first chapter of the book: On Value. From 1817, 1819 and 1821.
- http://www.economics.soton.ac.uk/staff/aldrich/ricardoindex.htm

The Development of Ricardo's Theory of Value
- An essay by Jacob Hollander in the Quarterly Journal of Economics.
- http://socserv2.socsci.mcmaster.ca/~econ/ugcm/3ll3/hollander/value.html

David Ricardo
- Synopsis of his major theories.
- http://www.scholars.nus.edu.sg/victorian/economics/ric.html

Encyclopedia.com | Ricardo, David
- Life and bibliography.
- http://www.encyclopedia.com/html/r/ricardo.asp

Comparative Advantage
- An article by the WTO on Samuelson's challenge.
- http://www.wto.org/english/res_e/reser_e/cadv_e.htm

Works by Ricardo
- "Essay on Profits" commenting on corn laws, and "The High Price of Bullion," on depreciation. Includes a bibliography and a PDF of the "Principles of Political Economy."
- http://socserv2.socsci.mcmaster.ca/~econ/ugcm/3ll3/ricardo/

The Theory of Comparative Advantage
- A highlight on Ricardo's lasting contribution, as well as a biography/bibliography.
- http://www.systemics.com/docs/ricardo/david.html

The Principles of Political Economy and Taxation
- Ricardo's 1817 work in full. Third edition.
- http://socserv2.socsci.mcmaster.ca/~econ/ugcm/3ll3/ricardo/prin/index.html

Modern History Sourcebook | The Iron Law of Wages
- A selection from Ricardo's book, On Wages, describing the labor theory of value.
- http://www.fordham.edu/halsall/mod/ricardo-wages.html