APA (7th ed.) Citation

D, K., D, B., J, V., I, G., C, M., C, S., . . . G, L. (2021). Effects of Environmental Factors on Severity and Mortality of COVID-19. Frontiers in medicine, 7, 607786. https://doi.org/10.3389/fmed.2020.607786

Chicago Style (17th ed.) Citation

D, Kifer, et al. "Effects of Environmental Factors on Severity and Mortality of COVID-19." Frontiers in Medicine 7 (2021): 607786. https://doi.org/10.3389/fmed.2020.607786.

MLA (9th ed.) Citation

D, Kifer, et al. "Effects of Environmental Factors on Severity and Mortality of COVID-19." Frontiers in Medicine, vol. 7, 2021, p. 607786, https://doi.org/10.3389/fmed.2020.607786.