Rujukan Perfini

  1. ↑ Vickers, Adrian (3 November 2005). A History of Modern Indonesia. Cambridge University Press. m/s. 253. Dicapai 12 January 2013. 
  2. ↑ Horison. Jajasan Indonesia. 1987. Dicapai 12 January 2013. 
  3. ↑ American Universities Field Staff (1966). Reports Service: Southeast Asia series. m/s. 204. Dicapai 12 January 2013.