APA (7th ed.) Citation

Clark, R. D. (1980). Erosion condition classification system. Bureau of Land Management, U.S. Dept. of the Interior.

Chicago Style (17th ed.) Citation

Clark, Ronnie D. Erosion Condition Classification System. Denver, Colo.: Bureau of Land Management, U.S. Dept. of the Interior, 1980.

MLA (9th ed.) Citation

Clark, Ronnie D. Erosion Condition Classification System. Bureau of Land Management, U.S. Dept. of the Interior, 1980.