World Health Organization. (1993). Environmental and health aspects of planning urban areas. WHO.
Citazione stile Chigago Style (17a edizione)World Health Organization. Environmental and Health Aspects of Planning Urban Areas. Geneva: WHO, 1993.
Citatione MLA (9a ed.)World Health Organization. Environmental and Health Aspects of Planning Urban Areas. WHO, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.