Aberia, . I. (2021). Getting to know Covid-19 vaccines. Manila Times.
Chicago-viite (17. p.)Aberia, Ingming. "Getting to Know Covid-19 Vaccines." Manila Times 2021.
MLA-viite (9. p.)Aberia, Ingming. "Getting to Know Covid-19 Vaccines." Manila Times, 2021.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.