1The Digital Reader. New BookStats Report Uses Questionable Data to Show Spectacular Growth of eBook Market Since 2008 [EB/ OL]. [2013-05-15] (2014-05-20). http://www, the-digital-reader. com/2013/05/15/new--bookstats-report-shows-spectacular-growth- of-ebook'-market-since-2008/.
2PwC. the U.S. consumer e-book market will be bigger than the print book market by 2017 [EB/OL]. [2013-06-04] (2014-03- 20). http://benton, org/node/153203.
4Ebook Magazine. Apple expands iBooks Textbooks and iTunes U Coarse Manager[EB/OL]. [2014-01-21] (2014-05-26).http:// www. ebookmagazine, co. uk/apple-expands-ibooks-textbooks-and- itunes-u-course-manager/20144547.
5The White House. President Obama Unveils ConnectED Initiative to Bring America's Students into Digital Age [EB/ OLJ. [2013-06-06] (2014-05-26). http://www, whitehouse, gov/the- press-office/2013/06/06/president-obama-unveils-connected- initiative-bring-america-s-students-di.
