Mendoza, . R. (2021). Sputnik V showed high, lingering efficacy vs Covid-19 – study. Manila Times.
Chicago-viite (17. p.)Mendoza, Red. "Sputnik V Showed High, Lingering Efficacy Vs Covid-19 – Study." Manila Times 2021.
MLA-viite (9. p.)Mendoza, Red. "Sputnik V Showed High, Lingering Efficacy Vs Covid-19 – Study." Manila Times, 2021.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.