Harford, T. (2010). Dear Under Cover Economist: The very best Letters from the 'Dear Economist' Column. Littele Brown.
芝加哥风格引文Harford, Tim. Dear Under Cover Economist: The Very Best Letters from the 'Dear Economist' Column. Londn: Littele Brown, 2010.
MLA引文Harford, Tim. Dear Under Cover Economist: The Very Best Letters from the 'Dear Economist' Column. Littele Brown, 2010.
警告：这些引文格式不一定是100％准确.