APA (7th ed.) Citation

Nora Alnomay, Layan Alolayan, Raghad Aljohani, Razan Almashouf, & Gharam Alharbi. (2022). Association between periodontitis and COVID-19 severity in a tertiary hospital: A retrospective cohort study. Elsevier.

Chicago Style (17th ed.) Citation

Nora Alnomay, Layan Alolayan, Raghad Aljohani, Razan Almashouf, and Gharam Alharbi. Association Between Periodontitis and COVID-19 Severity in a Tertiary Hospital: A Retrospective Cohort Study. Elsevier, 2022.

MLA (9th ed.) Citation

Nora Alnomay, et al. Association Between Periodontitis and COVID-19 Severity in a Tertiary Hospital: A Retrospective Cohort Study. Elsevier, 2022.