Ubel PA. (2009). Free market Madness. Harvard Bus. School Pub.
Chicago-čujuhus (17. p.)Ubel PA. Free Market Madness. Boston: Harvard Bus. School Pub, 2009.
MLA-čujuhus (9. p.)Ubel PA. Free Market Madness. Harvard Bus. School Pub, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.