United 93 [poster].
Chicago Style (17th ed.) CitationUnited 93 [poster].
MLA引文United 93 [poster].
警告：這些引文格式不一定是100％准確.
APA引文
United 93 [poster].
Chicago Style (17th ed.) CitationUnited 93 [poster].
MLA引文United 93 [poster].