Forrestar
Forrestar
http://www.forrester.com/Less+Than+1+Of+Online+Purchases+Come+From+Social+Channels/-/E-PRE4104
Marketing Facts
Marketing Facts
http://www.marketingfacts.nl/cookies/?s=%2Ftype%2Fonderzoek
Newcom
Newcom
http://www.newcom.nl/socialmedia2016
Nieuws Social
Nieuws Social
http://www.nieuws.social/strategie_nieuws/
Slideshare
Slideshare
http://www.slideshare.net/InSitesConsulting/social-media-around-the-world-2012-by-insites-consulting