McCloud, Kimberly (2001年3月7日). “WMD Terrorism and Usama bin Laden”. CNS Reports. James Martin Center for Nonproliferation Studies. 2011年5月6日時点のオリジナルよりアーカイブ。2011年5月4日閲覧。
McCloud, Kimberly (2001年3月7日). “WMD Terrorism and Usama bin Laden”. CNS Reports. James Martin Center for Nonproliferation Studies. 2011年5月6日時点のオリジナルよりアーカイブ。2011年5月4日閲覧。
C. Glenn – The IslamistsThe Wilson Centre September 28, 2015 Accessed June 15, 2017 – "... Zawahiri does not claim to have direct hierarchical control over al Qaeda's vast, networked structure. Al Qaeda's core leadership seeks to centralize the organization's messaging and strategy rather than to manage the daily operations of its franchises. But formal affiliates are required to consult with al Qaeda's core leadership before carrying out large-scale attacks."