Katigbak, A. F. (2005). Women need to take more Vitamin D to protect against osteoporosis. Philippine Star.
Chicago Style (17. basım) AtıfKatigbak, Antonio F. "Women Need to Take More Vitamin D to Protect Against Osteoporosis." Philippine Star 2005.
MLA (9th ed.) AtıfKatigbak, Antonio F. "Women Need to Take More Vitamin D to Protect Against Osteoporosis." Philippine Star, 2005.
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