Botones, L. (1999). QC execs cleared in Ozone tragedy. Manila Times.
Chicago Style aipamenaBotones, Lea. "QC Execs Cleared in Ozone Tragedy." Manila Times 1999.
MLA aipamenaBotones, Lea. "QC Execs Cleared in Ozone Tragedy." Manila Times, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.