20 Shocking Sales Stats That Will Change How You Sell
http://www.slideshare.net/JakeAtwood1/20-shocking-sales-stats
Cold Calling: 10 Tips and Tricks to Increase Your Success Rate
https://www.udemy.com/blog/cold-calling/
5 Steps to Cold Calling that Won’t Leave You Out in the Cold
https://www.engageselling.com/articles/060120article_coldcalling
Cold Calling Conversion Funnel Metrics and Benchmarks
http://blog.close.io/cold-calling-conversion-funnel-analytics
Seven Secrets to Cold Calling Success
http://www.entrepreneur.com/article/224931
Should You Give Up On Cold Calling as a Small Business Marketing Tool?
http://www.marketingforsuccess.com/sales/cold-calling/#ixzz3DYzbnLDm
Does Cold-Calling Still Work?
http://blog.simplesalestracking.com/2013/03/21/does-cold-calling-still-work/