[2016年2月4日]. (原始内容存档于2023年2月17日). Epstein, Matthew. Saudi Support for IslamicExtremism in the United States (PDF). Islam Daily. September 2003 [22 April
Collection of imagery of black flags used in Islamicextremism The Black Flag (al-raya)(页面存档备份,存于互联网档案馆) at The Islamic Imagery Project(页面存档备份,存于互联网档案馆), The
(原始内容存档于2020-10-12). al-Mdaires, Falah Abdullah. IslamicExtremism in Kuwait: From the Muslim Brotherhood to Al-Qaeda and other Islamic Political Groups. Routledge. 2010: