(2002). Synthetic hormone lowers ovarian cancer risk - study. Manila Bulletin.
Cita Chicago Style (17a ed.)"Synthetic Hormone Lowers Ovarian Cancer Risk - Study." Manila Bulletin 2002.
Cita MLA (9a ed.)"Synthetic Hormone Lowers Ovarian Cancer Risk - Study." Manila Bulletin, 2002.
Precaución: Estas citas no son 100% exactas.