(1997). The Philippine College of Chest Physicians at 25: A retrospect. Manila Chronicle.
Chicago Style aipamena"The Philippine College of Chest Physicians at 25: A Retrospect." Manila Chronicle 1997.
MLA aipamena"The Philippine College of Chest Physicians at 25: A Retrospect." Manila Chronicle, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.