Luz, G. (1998). Setting up a clean-air certificate program. Manila Times.
芝加哥风格引文Luz, Guillermo. "Setting Up a Clean-air Certificate Program." Manila Times 1998.
MLA引文Luz, Guillermo. "Setting Up a Clean-air Certificate Program." Manila Times, 1998.
警告：这些引文格式不一定是100％准确.