Estrada, E. (2003). Quadruplets born ; 3 die after hospital runaround. Manila Times.
芝加哥风格引文Estrada, Eric. "Quadruplets Born ; 3 Die After Hospital Runaround." Manila Times 2003.
MLA引文Estrada, Eric. "Quadruplets Born ; 3 Die After Hospital Runaround." Manila Times, 2003.
警告：这些引文格式不一定是100％准确.