Harford, T. (2010). Dear Under Cover Economist: The very best Letters from the 'Dear Economist' Column. Littele Brown.
Lua i Stíl Chicago (17ú heag.)Harford, Tim. Dear Under Cover Economist: The Very Best Letters from the 'Dear Economist' Column. Londn: Littele Brown, 2010.
Lua MLA (9ú heag.)Harford, Tim. Dear Under Cover Economist: The Very Best Letters from the 'Dear Economist' Column. Littele Brown, 2010.
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