Tham khảo Phá hoại (sabotage)

  1. ↑ Roughneck, The Life and Times of Big Bill Haywood, Peter Carlson, 1983, page 152.
  2. ↑ Jimthor, Stablewars, May 2008
  3. ↑ Roughneck, The Life and Times of Big Bill Haywood, Peter Carlson, 1983, pages 196–197.
  4. ↑ Rinehart, J.W. The Tyranny of Work, Canadian Social Problems Series. Academic Press Canada (1975), pp. 78–79. ISBN 0-7747-3029-3.