Guineden, D. (2000). Abu Sayyaf: A tough nut to crack. Philippine Graphic.
芝加哥风格引文Guineden, Darra. "Abu Sayyaf: A Tough Nut to Crack." Philippine Graphic 2000.
MLA引文Guineden, Darra. "Abu Sayyaf: A Tough Nut to Crack." Philippine Graphic, 2000.
警告：这些引文格式不一定是100％准确.