Kurtz, D. L. (2006). Pinciples of marketing 2006. Thomson.
Lua i Stíl Chicago (17ú heag.)Kurtz, David L. Pinciples of Marketing 2006. Thomson, 2006.
Lua MLA (8ú heag.)Kurtz, David L. Pinciples of Marketing 2006. Thomson, 2006.
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