Cordova, C. (2021). Gwen requires Cebu workers to wear personal air purifiers. Manila Bulletin.
芝加哥风格引文Cordova, Calvin. "Gwen Requires Cebu Workers to Wear Personal Air Purifiers." Manila Bulletin 2021.
MLA引文Cordova, Calvin. "Gwen Requires Cebu Workers to Wear Personal Air Purifiers." Manila Bulletin, 2021.
警告：这些引文格式不一定是100％准确.