World Health Organization. (1998). Health 21: Health for all in the 21st century. World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization. Health 21: Health for All in the 21st Century. Denmark: World Health Organization, 1998.
Citatione MLA (8a ed.)World Health Organization. Health 21: Health for All in the 21st Century. World Health Organization, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.