APA (7th ed.) Citation

Hydrologic Engineering Center (U.S.). (1990). HEC-1 : flood hydrograph package: User's manual. Hydrologic Engineering Center, US Army Corps of Engineers.

Chicago Style (17th ed.) Citation

Hydrologic Engineering Center (U.S.). HEC-1 : Flood Hydrograph Package: User's Manual. Davis, Calif: Hydrologic Engineering Center, US Army Corps of Engineers, 1990.

MLA (9th ed.) Citation

Hydrologic Engineering Center (U.S.). HEC-1 : Flood Hydrograph Package: User's Manual. Hydrologic Engineering Center, US Army Corps of Engineers, 1990.