Sadongdong, M. A. (2021). Nearly 1 M US-donated Pfizer vaccines arrive, more coming. Manila Bulletin.
芝加哥风格引文Sadongdong, Martin A. "Nearly 1 M US-donated Pfizer Vaccines Arrive, More Coming." Manila Bulletin 2021.
MLA引文Sadongdong, Martin A. "Nearly 1 M US-donated Pfizer Vaccines Arrive, More Coming." Manila Bulletin, 2021.
警告：这些引文格式不一定是100％准确.