Zaltman Gerald. (2003). How Customers Think: Essential insights into the mind of the market. HBSP.
Lua i Stíl Chicago (17ú heag.)Zaltman Gerald. How Customers Think: Essential Insights into the Mind of the Market. USA: HBSP, 2003.
Lua MLA (9ú heag.)Zaltman Gerald. How Customers Think: Essential Insights into the Mind of the Market. HBSP, 2003.
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