Isla, P. A. A. (2005). Energy dept recommends lower tariffs on oil products. Manila Times.
芝加哥风格引文Isla, Paul Anthony A. "Energy Dept Recommends Lower Tariffs on Oil Products." Manila Times 2005.
MLA引文Isla, Paul Anthony A. "Energy Dept Recommends Lower Tariffs on Oil Products." Manila Times, 2005.
警告：这些引文格式不一定是100％准确.