APA (7th ed.) Citation

United States. Environmental Protection Agency. (1990). Scoper's notes: An RI/FS costing guide. U.S. Environmental Protection Agency.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Scoper's Notes: An RI/FS Costing Guide. [Washington, D.C.?]: U.S. Environmental Protection Agency, 1990.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Scoper's Notes: An RI/FS Costing Guide. U.S. Environmental Protection Agency, 1990.