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Чикаго-гийн эшлэл (17 дахь хэвлэлт)Ahmed, S., et al. Protecting Children in Low-income and Middle-income Countries from COVID-19. BMJ Publishing Group, 2020.
MLA -ийн эшлэл (9 дэх хэвлэлт)Ahmed, S., et al. Protecting Children in Low-income and Middle-income Countries from COVID-19. BMJ Publishing Group, 2020.
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