(2020). Welcome COVID vaccine dev't around the world. IN Editorial [column]. Manila Bulletin.
Chicago Style (17th ed.) Citation"Welcome COVID Vaccine Dev't Around the World. IN Editorial [column]." Manila Bulletin 2020.
MLA引文"Welcome COVID Vaccine Dev't Around the World. IN Editorial [column]." Manila Bulletin, 2020.
警告：這些引文格式不一定是100％准確.