World Health Organization. (1998). Research abstracts South- East Asia region. WHO.
Chicago-viite (17. p.)World Health Organization. Research Abstracts South- East Asia Region. New Delhi: WHO, 1998.
MLA-viite (8. p.)World Health Organization. Research Abstracts South- East Asia Region. WHO, 1998.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.