Freiberg, K. (2004). Guts: Companies that blow the doors off business as usual. Currency.
芝加哥风格引文Freiberg, Kevin. Guts: Companies That Blow the Doors off Business as Usual. New york: Currency, 2004.
MLA引文Freiberg, Kevin. Guts: Companies That Blow the Doors off Business as Usual. Currency, 2004.
警告：这些引文格式不一定是100％准确.