World Health Organization & ebrary, Inc. (2010). World health statistics. World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization e Inc ebrary. World Health Statistics. Geneva: World Health Organization, 2010.
Citatione MLA (9a ed.)World Health Organization e Inc ebrary. World Health Statistics. World Health Organization, 2010.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.