Παραπομπή APA

Michael,Baber. (2010). How champions sell: Master the skils of world-class salespeople,win new customers, close more sales. Amacom.

Παραπομπή Chicago Style

Michael,Baber. How Champions Sell: Master the Skils of World-class Salespeople,win New Customers, Close More Sales. newyork: Amacom, 2010.

Παραπομπή MLA

Michael,Baber. How Champions Sell: Master the Skils of World-class Salespeople,win New Customers, Close More Sales. Amacom, 2010.

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