Chavez, C. A. (2021). Why the vaccination target was not reached. Manila Bulletin.
芝加哥风格引文Chavez, Chito A. "Why the Vaccination Target Was Not Reached." Manila Bulletin 2021.
MLA引文Chavez, Chito A. "Why the Vaccination Target Was Not Reached." Manila Bulletin, 2021.
警告：这些引文格式不一定是100％准确.