Power of positive selling Book 2012 Power of positive selling SS Stephan Schiffman 4 readers PublisherMcGraw-HillLanguageEnglishPublished2012 SellingPsychological aspects
The 25 sales habits of highly successful salespeople The 25 sales habits of highly successful salespeople 6 readers 2008
25 toughest sales objections (and how to overcome them) 25 toughest sales objections (and how to overcome them) 4 readers 2011