Dòng Nội dung
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Những đòn tâm lý trong bán hàng = The psychology of selling / Brian Tracy ; Huyền Trang dịch.
Hà Nội : Lao động - Xã hội, 2012.
303 tr.; 20 cm.

The psychology of selling teaches the skills needed for success in selling in spite of tough economic times, personal slumps and increased competition