Green, D. (2010). Water conservation for small- and medium-sized utilities. American Water Works Association.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Green, Deborah. Water Conservation for Small- and Medium-sized Utilities. Denver, Colo.: American Water Works Association, 2010.
MLA -ийн эшлэл (9 дэх хэвлэлт)Green, Deborah. Water Conservation for Small- and Medium-sized Utilities. American Water Works Association, 2010.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.