World Health Organization. (1991). Research abstracts: South-East Asia region. WHO.
Chicago-Zitierstil (17. Ausg.)World Health Organization. Research Abstracts: South-East Asia Region. New Delhi: WHO, 1991.
MLA-Zitierstil (8. Ausg.)World Health Organization. Research Abstracts: South-East Asia Region. WHO, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.