佟力强. (2013). 首都互联网发展报告 2013 2013: Annual report of Beijing internet industry. 人民出版社.
Lua i Stíl Chicago (17ú heag.)佟力强. 首都互联网发展报告 2013 2013: Annual Report of Beijing Internet Industry. 人民出版社, 2013.
Lua MLA (8ú heag.)佟力强. 首都互联网发展报告 2013 2013: Annual Report of Beijing Internet Industry. 人民出版社, 2013.
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