World Health Organization. Regional Office for Europe. (2020). Coronavirus disease (COVID-19) pandemic: Visit COVID-19 site for news, technical guidance and protection advice [electronic resource]. WHO Regional Office for Europe.
Citazione stile Chigago Style (17a edizione)World Health Organization. Regional Office for Europe. Coronavirus Disease (COVID-19) Pandemic: Visit COVID-19 Site for News, Technical Guidance and Protection Advice [electronic Resource]. Denmark: WHO Regional Office for Europe, 2020.
Citatione MLA (9a ed.)World Health Organization. Regional Office for Europe. Coronavirus Disease (COVID-19) Pandemic: Visit COVID-19 Site for News, Technical Guidance and Protection Advice [electronic Resource]. WHO Regional Office for Europe, 2020.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.