(原始内容存档于2021-08-22) (中文). 引文使用过时参数coauthors (帮助) Kludt, Tom. Brian Williams' reporting on Katrina: What we know. CNN. 2015-02-07 [2021-08-22]. (原始内容存档于2021-07-10)
'What If...?' Episode Count Revealed — And It's Not What You Think. Collider. 2021-08-02 [2021-08-02]. (原始内容存档于2021-08-02) (美国英语). Silliman, Brian. 'What