APA (7e ed.) Bronvermelding

Al-Khudairy, L., Uthman, O. A., Taylor-Phillips, S., Clarke, A., Osokogu, O., Grove, A., . . . Kumar, S. (2021). Association between vitamin D supplementation or serum vitamin D level and susceptibility to SARS-CoV-2 infection or COVID-19 including clinical course, morbidity and mortality outcomes? A systematic review. BMJ Publishing Group.

Chicago (17e ed.) Bronvermelding

Al-Khudairy, Lena, et al. Association Between Vitamin D Supplementation or Serum Vitamin D Level and Susceptibility to SARS-CoV-2 Infection or COVID-19 Including Clinical Course, Morbidity and Mortality Outcomes? A Systematic Review. BMJ Publishing Group, 2021.

MLA (9e ed.) Bronvermelding

Al-Khudairy, Lena, et al. Association Between Vitamin D Supplementation or Serum Vitamin D Level and Susceptibility to SARS-CoV-2 Infection or COVID-19 Including Clinical Course, Morbidity and Mortality Outcomes? A Systematic Review. BMJ Publishing Group, 2021.