Lua APA (7ú heag.)
ebrary, Inc, & American Water Works Association. (2004). Developing rates for small systems. American Water Works Association.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus American Water Works Association. Developing Rates for Small Systems. [Denver Colo.]: American Water Works Association, 2004.
Lua MLA (9ú heag.)
ebrary, Inc, agus American Water Works Association. Developing Rates for Small Systems. American Water Works Association, 2004.
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