Hubbard, D. W. (2007). How to measure anything: Finding the value of intangibles in business. John Wiley and Sons.
Chicago-Zitierstil (17. Ausg.)Hubbard, Douglas W. How to Measure Anything: Finding the Value of Intangibles in Business. Hoboken: John Wiley and Sons, 2007.
MLA-Zitierstil (9. Ausg.)Hubbard, Douglas W. How to Measure Anything: Finding the Value of Intangibles in Business. John Wiley and Sons, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.