Schultz, M. (s.f.) The 8 Buyer Personas (and How to Sell to Them) http://www.rainsalestraining.com/blog/the-8-buyer-personas-and-how-to-sell-to-them/

Mullins, W. (s.f.) How to Sell to Groups, Sell New Concepts, and Other Random Notes. Recuperado de: http://marketingconfessions.com/2012/05/how-to-sell-to-groups-sell-new-concepts-and-other-random-notes/