Lee Bill. (2012). Hidden Wealth of Customers: Realizing the untapped value of your most important asset. HBRP.
Chicago-referens (17:e uppl.)Lee Bill. Hidden Wealth of Customers: Realizing the Untapped Value of Your Most Important Asset. USA: HBRP, 2012.
MLA-referens (9:e uppl.)Lee Bill. Hidden Wealth of Customers: Realizing the Untapped Value of Your Most Important Asset. HBRP, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.