Cita APA (7th ed.)

Freiberg, K. (2004). Guts: Companies that blow the doors off business as usual. Currency.

Cita Chicago (17th ed.)

Freiberg, Kevin. Guts: Companies That Blow the Doors off Business as Usual. New york: Currency, 2004.

Cita MLA (9th ed.)

Freiberg, Kevin. Guts: Companies That Blow the Doors off Business as Usual. Currency, 2004.