World Health Organization. (1998). The world health report 1998: Life in the 21st century. World Health Organization.
Cita Chicago (17th ed.)World Health Organization. The World Health Report 1998: Life in the 21st Century. Geneva: World Health Organization, 1998.
Cita MLA (8th ed.)World Health Organization. The World Health Report 1998: Life in the 21st Century. World Health Organization, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.