World Health Organization. (2011). Guide to ship sanitation. World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization. Guide to Ship Sanitation. Geneva, Switzerland: World Health Organization, 2011.
Citatione MLA (8a ed.)World Health Organization. Guide to Ship Sanitation. World Health Organization, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.