APA (7th ed.) Citation

United States. Environmental Protection Agency. Office of Water. (2003). Land cover digital data directory for the United States. United States Environmental Protection Agency, Office of Water.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Office of Water. Land Cover Digital Data Directory for the United States. [Washington, D.C.]: United States Environmental Protection Agency, Office of Water, 2003.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Office of Water. Land Cover Digital Data Directory for the United States. United States Environmental Protection Agency, Office of Water, 2003.