World health Organization. (2004). Air quality guidelines,Global update 2005: Particulate matter, ozone nitrogen dioxide and sulfur dioxide. World Health Organization.
Citação norma ChicagoWorld health Organization. Air Quality Guidelines,Global Update 2005: Particulate Matter, Ozone Nitrogen Dioxide and Sulfur Dioxide. copenhagen: World Health Organization, 2004.
Citação norma MLAWorld health Organization. Air Quality Guidelines,Global Update 2005: Particulate Matter, Ozone Nitrogen Dioxide and Sulfur Dioxide. World Health Organization, 2004.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.