Villanueva, M. A. (2021). COVID-19 test first before vaccinating?. IN Commonsense [column]. Philippine Star.
Chicago Style (17. basım) AtıfVillanueva, Marichu A. "COVID-19 Test First Before Vaccinating?. IN Commonsense [column]." Philippine Star 2021.
MLA (9th ed.) AtıfVillanueva, Marichu A. "COVID-19 Test First Before Vaccinating?. IN Commonsense [column]." Philippine Star, 2021.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..