OMS. Financial management of water supply and sanitation. Geneva: OMS.
Παραπομπή Chicago StyleOMS. Financial Management of Water Supply and Sanitation. Geneva: OMS.
Παραπομπή MLAOMS. Financial Management of Water Supply and Sanitation. Geneva: OMS.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.