World Health Organization. (2000). International travel and health: Vaccination requirements and health advice. World Health Organization.
Citação do estilo Chicago (17ª ed.)World Health Organization. International Travel and Health: Vaccination Requirements and Health Advice. Geneva: World Health Organization, 2000.
Citação MLA (8ª ed.)World Health Organization. International Travel and Health: Vaccination Requirements and Health Advice. World Health Organization, 2000.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.