Salaverria, L. B. (2021). DOH: Sputnik V vaccines can wait 6 months for 2nd dose. Philippine Daily Inquirer.
Chicago-viite (17. p.)Salaverria, Leila B. "DOH: Sputnik V Vaccines Can Wait 6 Months for 2nd Dose." Philippine Daily Inquirer 2021.
MLA-viite (9. p.)Salaverria, Leila B. "DOH: Sputnik V Vaccines Can Wait 6 Months for 2nd Dose." Philippine Daily Inquirer, 2021.
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