Hubbard, D. W. (2014). How to measure anything workbook: Finding the value of "intangibles" in business (Third edition.). Wiley.
Lua i Stíl Chicago (17ú heag.)Hubbard, Douglas W. How to Measure Anything Workbook: Finding the Value of "Intangibles" in Business. Third edition. Hoboken, New Jersey: Wiley, 2014.
Lua MLA (9ú heag.)Hubbard, Douglas W. How to Measure Anything Workbook: Finding the Value of "Intangibles" in Business. Third edition. Wiley, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.