James Tyson, Ann Tyson, Chinese awakenings: life stories from the unofficial China, Westview Press, 1995, p. 123, ISBN0-8133-2473-4. URL consultato il 28 giugno 2010.(Note, the google book link has gone haywire, but you should still be directed to page 123 when you go to the link, where you should see the paragraph the reference is from)