Hubbard, D. W. (2010). How to measure anything: Finding the value of intangibles in business (2a. ed.). John Wiley and Sons, Inc.
Cita Chicago (17th ed.)Hubbard, Douglas W. How to Measure Anything: Finding the Value of Intangibles in Business. 2a. ed. Hoboken: John Wiley and Sons, Inc, 2010.
Cita MLA (9th ed.)Hubbard, Douglas W. How to Measure Anything: Finding the Value of Intangibles in Business. 2a. ed. John Wiley and Sons, Inc, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.