1. 9/11 Commission Report (2006) Final report of the national commission on terrorist attacks upon the United States. W. W. Norton & Company
2. Abdul-Ahad G (2015) Concern over burgeoning trade in fake and stolen Syrian passports. The Guardian. Accessed online: https://www.theguardian.com/world/2015/sep/08/growing-concern-over-trade-in-fake-and-stolen-syrian-passports
3. Al-Asmari AA (2009) Arab Islamic concept of intelligence in the case of Fatah Paramilitary. Brunel University
4. Al-Jazeera (2017) ISIL holds 11,100 blank Syrian passports. Al-Jazeera. Accessed online: http://www.aljazeera.com/news/2017/09/isil-holds-11100-blank-syrian-passports-report-170910090921948.html
5. Al-Suri AM (2002) Lessons learned from the Jihād Ordeal in Syria. Document captured by US troops in Afghanistan 2002. AFGP-2002-600080. Accessed online: https://ctc.usma.edu/app/uploads/2013/10/AFGP-2002-600080-Translation.pdf