1. Alberts, K., Campbell, J. & Louw, L. (2010). Crowdsourcing : the end of marketing research? Journal of Marketing, 28-29.
2. Beard. N. (2013). How to Use Crowdsourcing for Content Marketing Inspiration. TopRank® Online Marketing. Retrieved October 21, 2013, from http://www.toprankblog.com/2013/09/crowdsourcing-as-content-inspiration/.
3. Crowdsourcing as a model for problem solving: An introduction and cases;Brabham;Convergence,2008
4. Brabham, D.C. (2013). Crowdsourcing. Cambridge: The MIT Press.
5. Brockington, T. (2013). Holler's ‘Land of quattro’ competition for Audi Australia produces budding director Jem Downing. Campaign Brief. Retrieved October 21, 2013, from http://www.campaignbrief.com/2013/10/audi-announces-land-of-quattro.html.