World Health Organization. (1999). Sexually transmitted infections prevalence study methodology. World Health Organization.
Citação do estilo Chicago (17ª ed.)World Health Organization. Sexually Transmitted Infections Prevalence Study Methodology. Geneva,Switzerland: World Health Organization, 1999.
Citação MLA (8ª ed.)World Health Organization. Sexually Transmitted Infections Prevalence Study Methodology. World Health Organization, 1999.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.