APA (7th ed.) Citation

United States. Natural Resources Conservation Service, Oklahoma Agricultural Experiment Station, & Oklahoma Conservation Commission. (2006). Soil Survey of Harper County, Oklahoma. Natural Resources Conservation Service.

Chicago Style (17th ed.) Citation

United States. Natural Resources Conservation Service, Oklahoma Agricultural Experiment Station, and Oklahoma Conservation Commission. Soil Survey of Harper County, Oklahoma. [Washington, D.C.]: Natural Resources Conservation Service, 2006.

MLA (9th ed.) Citation

United States. Natural Resources Conservation Service, et al. Soil Survey of Harper County, Oklahoma. Natural Resources Conservation Service, 2006.