World Health Organization. (1998). Research abstracts South-East Asia region. WHO.
Cita Chicago (17th ed.)World Health Organization. Research Abstracts South-East Asia Region. New Delhi: WHO, 1998.
Cita MLA (8th ed.)World Health Organization. Research Abstracts South-East Asia Region. WHO, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.