Guineden, D. (2000). Abu Sayyaf: A tough nut to crack. Philippine Graphic.
Cita Chicago (17th ed.)Guineden, Darra. "Abu Sayyaf: A Tough Nut to Crack." Philippine Graphic 2000.
Cita MLA (9th ed.)Guineden, Darra. "Abu Sayyaf: A Tough Nut to Crack." Philippine Graphic, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.