David E. Sumner (May 2012). "American winners and losers:2001 to 2010"(PDF). International Conference on Communication, Media, Technology and Design. Istanbul. Archived(PDF) from the original on September 24, 2016. Retrieved June 25, 2016.
David E. Sumner (May 2012). "American winners and losers:2001 to 2010"(PDF). International Conference on Communication, Media, Technology and Design. Istanbul. Archived(PDF) from the original on September 24, 2016. Retrieved June 25, 2016.