Digital: Study Says Most Marketers Should Forgo Foursquare – Advertising Age – Digital David Polinchock 29/07/2010
Google, Facebook, Twitter, YouTube & Now Foursquare? The Loosely Coupled Operating System for the Web… John Sviokla 30/06/2010
Twitter and Facebook Follow Foursquare – 2010 Is the Year of Location-based Social Media Tools Matt Rhodes 10/03/2010