Não informado. Philippine Journal of Surgery, Obstetrics and Gynecology. Philippine College of Surgeons.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Philippine Journal of Surgery, Obstetrics and Gynecology. Manila: Philippine College of Surgeons.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Philippine Journal of Surgery, Obstetrics and Gynecology. Philippine College of Surgeons.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.