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.
Chicago (17e ed.) Bronvermelding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.
MLA (8e ed.) Bronvermelding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.
Let op: Deze citaties zijn niet altijd 100% accuraat.