Cita APA (7a ed.)

Choi, H. G., Jung, Y., & Kwon, M. (2021). Association between previous rheumatoid arthritis and COVID-19 and its severity: A nationwide cohort study in South Korea. BMJ Publishing Group.

Cita Chicago Style (17a ed.)

Choi, Hyo Geun, Younghee Jung, y Mihye Kwon. Association Between Previous Rheumatoid Arthritis and COVID-19 and Its Severity: A Nationwide Cohort Study in South Korea. BMJ Publishing Group, 2021.

Cita MLA (8a ed.)

Choi, Hyo Geun, et al. Association Between Previous Rheumatoid Arthritis and COVID-19 and Its Severity: A Nationwide Cohort Study in South Korea. BMJ Publishing Group, 2021.