Perez, W. (1994). Abu Sayyaf allies kill 20 civilians in Basilan. Philippine Star.
芝加哥风格引文Perez, Willy. "Abu Sayyaf Allies Kill 20 Civilians in Basilan." Philippine Star 1994.
MLA引文Perez, Willy. "Abu Sayyaf Allies Kill 20 Civilians in Basilan." Philippine Star, 1994.
警告：这些引文格式不一定是100％准确.