Harford, T. (2006). The undercover economist. Little Brown.
芝加哥风格引文Harford, Tim. The Undercover Economist. London: Little Brown, 2006.
MLA引文Harford, Tim. The Undercover Economist. Little Brown, 2006.
警告：这些引文格式不一定是100％准确.
APA引文