Mercado, J. L. (1999). Old problem bug bustling Cebu Ecozone. Philippine Star.
芝加哥风格引文Mercado, Juan L. "Old Problem Bug Bustling Cebu Ecozone." Philippine Star 1999.
MLA引文Mercado, Juan L. "Old Problem Bug Bustling Cebu Ecozone." Philippine Star, 1999.
警告：这些引文格式不一定是100％准确.