Jelaskan Rujukan dari Kawat berduri dalam bahasa melayu

Henry D. and Frances T. McCallum. The Wire that Fenced the West. Norman: University of Oklahoma Press, 1965. LoC: 65-11234.

Olivier Razac. Barbed Wire: A Political History, W. W. Norton & Company, 2003, ISBN 1-56584-812-8

Biography of John W. Gates, barbed wire promoter who monopolized the industry with the American Steel and Wire Company, dicapai 29 Mac 2006