World Health Organization. (1997). Health imperatives for South - East Asia. World Health organization.
Chicago-viite (17. p.)World Health Organization. Health Imperatives for South - East Asia. New Delhi: World Health organization, 1997.
MLA-viite (8. p.)World Health Organization. Health Imperatives for South - East Asia. World Health organization, 1997.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.