[en] Stephan Schiffman's Telesales Adams Media
[en] The 250 Sales Questions To Close The Deal Adams Media
[en] Closing Techniques (That Really Work!) Adams Media
[en] Cold Calling Techniques Adams Media
[en] The 25 Sales Skills · They Don't Teach at Business School Adams Media
[en] The 25 Most Common Sales Mistakes · . . . And How to Avoid Them Adams Media
[en] The 25 Sales Habits of Highly Successful Salespeople Adams Media Corporation
[en] Creating Sales Stars Amacom
[en] Computer Games Springer