APA (7th ed.) Citation

AM, A., & K, G. The Severity of the COVID-19 Among Chronic Disease Patients in the Selected Hospitals in Riyadh, Saudi Arabia – A Retrospective Study [Letter]. Dove Medical Press.

Chicago Style (17th ed.) Citation

AM, Al-Wathinani, and Goniewicz K. The Severity of the COVID-19 Among Chronic Disease Patients in the Selected Hospitals in Riyadh, Saudi Arabia – A Retrospective Study [Letter]. Dove Medical Press.

MLA (9th ed.) Citation

AM, Al-Wathinani, and Goniewicz K. The Severity of the COVID-19 Among Chronic Disease Patients in the Selected Hospitals in Riyadh, Saudi Arabia – A Retrospective Study [Letter]. Dove Medical Press.

Warning: These citations may not always be 100% accurate.