Hardin, R. (2009). How do you know?: The economics of ordinary knowledge. Princeton University Press.
Chicago-čujuhus (17. p.)Hardin, Russell. How Do You Know?: The Economics of Ordinary Knowledge. Princeton, NJ: Princeton University Press, 2009.
MLA-čujuhus (9. p.)Hardin, Russell. How Do You Know?: The Economics of Ordinary Knowledge. Princeton University Press, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.