San Juan, A. D. (2022). COVID vax certificates of 4 more countries recognized. Manila Bulletin.
Citazione stile Chigago Style (17a edizione)San Juan, Alexandria Dennise. "COVID Vax Certificates of 4 More Countries Recognized." Manila Bulletin 2022.
Citatione MLA (9a ed.)San Juan, Alexandria Dennise. "COVID Vax Certificates of 4 More Countries Recognized." Manila Bulletin, 2022.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.