Calapan, S. C. (2002). RP's first info center on heart disease opens. Manila Bulletin.
Chicago Style aipamenaCalapan, Sheila C. "RP's First Info Center on Heart Disease Opens." Manila Bulletin 2002.
MLA aipamenaCalapan, Sheila C. "RP's First Info Center on Heart Disease Opens." Manila Bulletin, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.