World Health Organization. (1991). Research abstracts: South-East Asia region. WHO.
Citazione stile Chigago Style (17a edizione)World Health Organization. Research Abstracts: South-East Asia Region. New Delhi: WHO, 1991.
Citatione MLA (8a ed.)World Health Organization. Research Abstracts: South-East Asia Region. WHO, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.