APA (7th ed.) Citation

Ketfi, A., Touahri, R., Aissani, S., & Snouber, A. The Impact of Smoking on the Severity of COVID-19 and Risk Factors for Mortality: A Prospective Study in Hospitalized Patients. Wolters Kluwer Medknow Publications.

Chicago Style (17th ed.) Citation

Ketfi, Abdelbassat, Rama Touahri, Samia Aissani, and Abdelmadjid Snouber. The Impact of Smoking on the Severity of COVID-19 and Risk Factors for Mortality: A Prospective Study in Hospitalized Patients. Wolters Kluwer Medknow Publications.

MLA (9th ed.) Citation

Ketfi, Abdelbassat, et al. The Impact of Smoking on the Severity of COVID-19 and Risk Factors for Mortality: A Prospective Study in Hospitalized Patients. Wolters Kluwer Medknow Publications.