World Health Organization. (1998). Health 21: Health for all in the 21st century. World Health Organization.
Citación estilo ChicagoWorld Health Organization. Health 21: Health for All in the 21st Century. Denmark: World Health Organization, 1998.
Cita MLAWorld Health Organization. Health 21: Health for All in the 21st Century. World Health Organization, 1998.
Warning: These citations may not always be 100% accurate.