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Чикаго-гийн эшлэл (17 дахь хэвлэлт)de Lusignan, S., et al. Emergence of a Novel Coronavirus (COVID-19): Protocol for Extending Surveillance Used by the Royal College of General Practitioners Research and Surveillance Centre and Public Health England. JMIR Publications, 2020.
MLA -ийн эшлэл (9 дэх хэвлэлт)de Lusignan, S., et al. Emergence of a Novel Coronavirus (COVID-19): Protocol for Extending Surveillance Used by the Royal College of General Practitioners Research and Surveillance Centre and Public Health England. JMIR Publications, 2020.