Estrada, E. (2003). Quadruplets born ; 3 die after hospital runaround. Manila Times.
Cita Chicago (17th ed.)Estrada, Eric. "Quadruplets Born ; 3 Die After Hospital Runaround." Manila Times 2003.
Cita MLA (9th ed.)Estrada, Eric. "Quadruplets Born ; 3 Die After Hospital Runaround." Manila Times, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.