1. Marcotte E (2011) Responsive Webdesign. A Book Apart, New York
2. Anderson C (2006) The Long Tail. Hachette Books, New York
3. Kaushik A (2009) Web Analytics 2.0. John Wiley & Sons, New York
4. Howe J (2008) Crowdsourcing. Why the power of the crowd is driving the future of business. Crown Business, New York
5. Lewandowski D (2011) Evaluierung von Suchmaschine. Handbuch Internet-Suchmaschinen, Bd. 2. Akademische Verlagsgesellschaft AKA, Heidelberg, S 203–226