World Health Organization & ebrary, Inc. (2007). World health statistics 2007. World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization e Inc ebrary. World Health Statistics 2007. Geneva, Switzerland: World Health Organization, 2007.
Citatione MLA (9a ed.)World Health Organization e Inc ebrary. World Health Statistics 2007. World Health Organization, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.