Harvard Characteristics of Great Sales People
Sales & Social Media Tips. (2014, 4 de abril). Harvard Characteristics of Great Sales People [Archivo de video]. Recuperado de https://www.youtube.com/watch?v=kWwaU_gTkPw
What Makes Great Salespeople Great
Sales Training Television. (2012, 10 de mayo). What Makes Great Salespeople Great [Archivo de video]. Recuperado de https://www.youtube.com/watch?v=YpSGulfG-Gc