Sadongdong, M. A. (2020). Gov't faces vaccine confidence issues. Manila Bulletin.
芝加哥风格引文Sadongdong, Martin A. "Gov't Faces Vaccine Confidence Issues." Manila Bulletin 2020.
MLA引文Sadongdong, Martin A. "Gov't Faces Vaccine Confidence Issues." Manila Bulletin, 2020.
警告：这些引文格式不一定是100％准确.