Tzu-Tsai Cheng v. Governor of Pentonville Prison, 2 All E.R. 204 (United Kingdom House of Lords (Judicial Committee) 16 April 1973) ("Lords Wilberforce and Simon, voting to allow the appeal; and Lords Hodson, Diplock and Salmon, voting to dismiss the appeal.").
許維德 (13 April 2007). 海外台獨運動中驚天動地的那一聲槍響:「424刺蔣案」主角之一鄭自才訪談錄 [Overseas Taiwan independence movement, that earth-shattering gunshot: "424 Chiang assassination attempt", exclusive interview with Cheng Tzu-tsai]. World United Formosans for Independence. Retrieved 28 October 2015.