United States. Environmental Protection Agency. Office of Water. (1999). BASINS technical note 4: Incorporating upstream flow and water quality time series in the nonpoint source model (NPSM). United States Environmental Protection Agency, Office of Water.
Chicago Style (17th ed.) CitationUnited States. Environmental Protection Agency. Office of Water. BASINS Technical Note 4: Incorporating Upstream Flow and Water Quality Time Series in the Nonpoint Source Model (NPSM). [Washington, D.C.]: United States Environmental Protection Agency, Office of Water, 1999.
MLA (9th ed.) CitationUnited States. Environmental Protection Agency. Office of Water. BASINS Technical Note 4: Incorporating Upstream Flow and Water Quality Time Series in the Nonpoint Source Model (NPSM). United States Environmental Protection Agency, Office of Water, 1999.