1. Ashworth, A. (1990). The Politics of Official Discourse in Twentieth-Century South Africa. Oxford: The Clarendon Press.
2. Baidu User, (2015). Which uni has “Baoyan lu”? (Naxie xuexiao you bao yan lu). Baidu Forum, 17 January, retrieved from: https://zhidao.baidu.com/question/560752631741159604.html?qbl=relate_question_2
3. Baozi. (2009). Let’s talk about the “Baoyan lu” in your uni. Tianya Forum, 12 April, retrieved from: http://bbs.tianya.cn/post-free-1539038-1.shtml
4. ______. (2010). Eighty per cent of crimes in Changping District are commited by migrants (Changpingqu fanzui bacheng wei liudong renkou) Sina News, 25 August, retrieved from: http://news.sina.com.cn/o/2010-08-25/023918015095s.shtml
5. ______. (2015). Beijing Police targeting migrants in the Summer. BJ News, 7 June, retrieved from: http://www.bjnews.com.cn/news/2015/06/07/467599.html