1. About thinking ability: "Six Thinking Hats" edward de bono "Thinking Technology" [Japan] Kenichi Ohmae

2. About sales psychology: Influence: Robert? b？ Robert B. Cialdini's "The Weakness of Human Nature" Carnegie's "How to Influence Customers' Purchasing Decisions" John McCann

About telemarketing ability: Li Zhixian telemarketing psychology, Chen Si Li Zhixian telemarketing training.

4. About the ability to ask questions: the sales method of asking questions [America] forest spin sales giant, Sun Luhong, the first book of automobile sales.

Verb (short for verb) Persuade: The story winner Annette Simmons Persuade-Gordon Stein's 50 Secrets

On negotiation ability: win-win negotiation, lyna, what is negotiation (English), Kennedy, advantage negotiation, Roger? Dawson

Seven. On the speaking ability: Technical Presentation Strategy Ding Xingliang and Zhang Zhi's Easy Speaking: A Dai Series (USA) kushner (Kushner, M.

I recommend the classic book: Dialogue with the Heart by Carnegie ([America] Carnegie (D))