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Lua i Stíl Chicago (17ú heag.)Tupas, Emmanuel, Cecille Suerte Felipe, Neil Jayson Servallos, agus Rudy Santos. "Gov't Prodded to Act on Vaccine Tripartite Agreements." Philippine Star 2021.
Lua MLA (9ú heag.)Tupas, Emmanuel, et al. "Gov't Prodded to Act on Vaccine Tripartite Agreements." Philippine Star, 2021.
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