Ellis Nick. (2011). Business to Business Marketing: B 2B Marketing Programmes vol.4. Sage.
Lua i Stíl Chicago (17ú heag.)Ellis Nick. Business to Business Marketing: B 2B Marketing Programmes Vol.4. London: Sage, 2011.
Lua MLA (9ú heag.)Ellis Nick. Business to Business Marketing: B 2B Marketing Programmes Vol.4. Sage, 2011.
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