อ้างอิง ของ ม่านเหล็ก

  1. ↑ "Archive: Freedom! The Berlin Wall". Time. 20 November 1989. สืบค้นเมื่อ 5 May 2010.
  2. ↑ Sorin Antohi and Vladimir Tismăneanu, "Independence Reborn and the Demons of the Velvet Revolution" in Between Past and Future: The Revolutions of 1989 and Their Aftermath, Central European University Press. ISBN 963-9116-71-8. p.85.
  3. ↑ Boyes, Roger (2009-06-04). "World Agenda: 20 years later, Poland can lead eastern Europe once again". The Times. สืบค้นเมื่อ 2009-06-04.
  4. ↑ Piotr Sztompka, preface to Society in Action: the Theory of Social Becoming, University of Chicago Press. ISBN 0-226-78815-6. p. x.