World Health Organization. (1991). Research abstracts: South-East Asia region. WHO.
Chicago-referens (17:e uppl.)World Health Organization. Research Abstracts: South-East Asia Region. New Delhi: WHO, 1991.
MLA-referens (8:e uppl.)World Health Organization. Research Abstracts: South-East Asia Region. WHO, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.