APA-čujuhus (7. p.)

Clift, A., von Ende, A., Tan, P., Sallis, H., Lindson, N., Coupland, C., . . . Hopewell, J. (2021). Smoking and COVID-19 outcomes: An observational and Mendelian randomisation study using the UK Biobank cohort. BMJ.

Chicago-čujuhus (17. p.)

Clift, AK, et al. Smoking and COVID-19 Outcomes: An Observational and Mendelian Randomisation Study Using the UK Biobank Cohort. BMJ, 2021.

MLA-čujuhus (9. p.)

Clift, AK, et al. Smoking and COVID-19 Outcomes: An Observational and Mendelian Randomisation Study Using the UK Biobank Cohort. BMJ, 2021.

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