World Health Organization. (2011). Atlas of headache disorders and resources in the world 2011. World Health Organization.
Citação norma ChicagoWorld Health Organization. Atlas of Headache Disorders and Resources in the World 2011. Geneva, Switzerland: World Health Organization, 2011.
Citação norma MLAWorld Health Organization. Atlas of Headache Disorders and Resources in the World 2011. World Health Organization, 2011.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.