World Health Organization. (2006). International health regulations (2005). World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization. International Health Regulations (2005). Geneva: World Health Organization, 2006.
Citatione MLA (8a ed.)World Health Organization. International Health Regulations (2005). World Health Organization, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.