Casinas, J. A. (2021). Delta variant not as contagious among PGH frontliners due to vaccines, health protocols - FDA. Manila Bulletin.
Cita Chicago Style (17a ed.)Casinas, Jhon Aldrin. "Delta Variant Not as Contagious Among PGH Frontliners Due to Vaccines, Health Protocols - FDA." Manila Bulletin 2021.
Cita MLA (9a ed.)Casinas, Jhon Aldrin. "Delta Variant Not as Contagious Among PGH Frontliners Due to Vaccines, Health Protocols - FDA." Manila Bulletin, 2021.
Precaución: Estas citas no son 100% exactas.