Aben, E. L. (2012). Sayyaf leader linked to 2007 beheading falls. Manila Bulletin.
芝加哥风格引文Aben, Elena L. "Sayyaf Leader Linked to 2007 Beheading Falls." Manila Bulletin 2012.
MLA引文Aben, Elena L. "Sayyaf Leader Linked to 2007 Beheading Falls." Manila Bulletin, 2012.
警告：这些引文格式不一定是100％准确.