| http://www.w3.org/ns/prov#value | - His writings have been referenced in several mainstream publications and websites, including The Washington Post, MSNBC.com, Ad Age, CNET, and The Boston Globe.Mack is also a frequently requested speaker and has presented at some of the top social media conferences and events, including South By Southwest Interactive, MarketingProfs Digital Marketing Mixer, and Small Business Marketing Unleashed.
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