World Health Organization. (1991). Research abstracts: South-East Asia region. WHO.
Chicago (17e ed.) BronvermeldingWorld Health Organization. Research Abstracts: South-East Asia Region. New Delhi: WHO, 1991.
MLA (8e ed.) BronvermeldingWorld Health Organization. Research Abstracts: South-East Asia Region. WHO, 1991.
Let op: Deze citaties zijn niet altijd 100% accuraat.