Lee Bill. (2012). Hidden Wealth of Customers: Realizing the untapped value of your most important asset. HBRP.
Chicago-čujuhus (17. p.)Lee Bill. Hidden Wealth of Customers: Realizing the Untapped Value of Your Most Important Asset. USA: HBRP, 2012.
MLA-čujuhus (9. p.)Lee Bill. Hidden Wealth of Customers: Realizing the Untapped Value of Your Most Important Asset. HBRP, 2012.
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