Calumpita, R. E. (2005). Hospitals lack waste treatment. Manila Times.
芝加哥风格引文Calumpita, Ronnie E. "Hospitals Lack Waste Treatment." Manila Times 2005.
MLA引文Calumpita, Ronnie E. "Hospitals Lack Waste Treatment." Manila Times, 2005.
警告：这些引文格式不一定是100％准确.