Guineden, D. (2000). Abu Sayyaf: A tough nut to crack. Philippine Graphic.
Lua i Stíl Chicago (17ú heag.)Guineden, Darra. "Abu Sayyaf: A Tough Nut to Crack." Philippine Graphic 2000.
Lua MLA (9ú heag.)Guineden, Darra. "Abu Sayyaf: A Tough Nut to Crack." Philippine Graphic, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.