Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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