Zhang Langlang. "Sun Weishi's Story". The Collected Works of Zhang Langlang. Boxun News Network. Retrieved at <http://blog.boxun.com/hero/zhangll/9_1.shtml> on June 9, 2011. pp.3, 5
jstor.org
Teiwes, Frederick C. & Sun, Warren. "The First Tiananmen Incident Revisited: Elite Politics and Crisis Management at the End of the Maoist Era". Pacific Affairs. Vol. 77, No. 2, Summer, 2004. 211-235. Retrieved from <http://www.jstor.org/stable/40022499> on March 11, 2011. p.213
