Diaz, J. (2005). Small oil firms now part of oil cartel - lawmaker. Philippine Star.
芝加哥风格引文Diaz, Jess. "Small Oil Firms Now Part of Oil Cartel - Lawmaker." Philippine Star 2005.
MLA引文Diaz, Jess. "Small Oil Firms Now Part of Oil Cartel - Lawmaker." Philippine Star, 2005.
警告：这些引文格式不一定是100％准确.