William Walker 
The Psychology of Salesmanship [EPUB ebook] 

The Psychology of Salesmanship is a book by William Walker Atkinson, first published in 1912, that focuses on helping businesses and salespeople in persuading their customers to buy their products. Chapters include: Psychology in Business; The Mind of the Salesman; The Mind of the Buyer; The Pre-Approach; The Psychology of Purchase; The Approach; The Demonstration; and, The Closing.