(2022). COVID-19 [Virtualna zbirka]. https://urn.nsk.hr/urn:nbn:hr:184:551738.
COVID-19. 2022. 25.12.2024. https://urn.nsk.hr/urn:nbn:hr:184:551738.
2022. COVID-19. https://urn.nsk.hr/urn:nbn:hr:184:551738.
(2022). 'COVID-19'. [Online]. [Citirano 25.12.2024.]. Preuzeto s: https://urn.nsk.hr/urn:nbn:hr:184:551738.
COVID-19. [Internet]. 2022 [pristupljeno 25.12.2024.] Dostupno na: https://urn.nsk.hr/urn:nbn:hr:184:551738.
COVID-19, 2022. Citirano: 25.12.2024. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:184:551738.