APA način citiranja (7. izdanje)
Hopkinson, N., & et al. (2021). Current smoking and COVID-19 risk: Results from a population symptom app in over 2.4 million people.
Čikaški stil citiranja (17. izdanje)
Hopkinson, N.S, i et al. Current Smoking and COVID-19 Risk: Results from a Population Symptom App in over 2.4 Million People. 2021.
MLA način citiranja (9. izdanje)
Hopkinson, N.S, i et al. Current Smoking and COVID-19 Risk: Results from a Population Symptom App in over 2.4 Million People. 2021.
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