อ้างอิง ของ ค็อนราท ชูมัน

  1. ↑ CONRAD SCHUMANN, 56, SYMBOL OF E. BERLIN ESCAPES; [NORTH SPORTS FINAL Edition]Associated Press. Chicago Tribune. Chicago, Ill.: Jun 23, 1998. p. 8
  2. ↑ "Escaped soldier found hanged"DENIS STAUNTON. The Guardian. Manchester (UK): Jun 22, 1998. p. K2
  3. ↑ Diekmann, Kai. Die Mauer. Fakten, Bilder, Schicksale. München: Piper, 2011 (ISBN 978-3-492-05485-0), p. 45
  4. ↑ German Commission for UNESCO, World Documentary Heritage in Germany