Harford, T. (2006). The undercover economist. Little Brown.
Chicago-čujuhus (17. p.)Harford, Tim. The Undercover Economist. London: Little Brown, 2006.
MLA-čujuhus (9. p.)Harford, Tim. The Undercover Economist. Little Brown, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.