APA (7th ed.) Citation

United States. Forest Service. Rocky Mountain Region & Geometronics Service Center (U.S.). (1999). Buffalo Gap National Grassland, South Dakota (Rev. in 1990.). U.S. Dept. of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Rocky Mountain Region and Geometronics Service Center (U.S.). Buffalo Gap National Grassland, South Dakota. Rev. in 1990. Denver, CO: U.S. Dept. of Agriculture, Forest Service, 1999.

MLA (9th ed.) Citation

United States. Forest Service. Rocky Mountain Region and Geometronics Service Center (U.S.). Buffalo Gap National Grassland, South Dakota. Rev. in 1990. U.S. Dept. of Agriculture, Forest Service, 1999.