Freiberg, K. (2004). Guts: Companies that blow the doors off business as usual. Currency.
Chicago-čujuhus (17. p.)Freiberg, Kevin. Guts: Companies That Blow the Doors off Business as Usual. New york: Currency, 2004.
MLA-čujuhus (9. p.)Freiberg, Kevin. Guts: Companies That Blow the Doors off Business as Usual. Currency, 2004.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.