Cole, E. L., Bartolina, D. G., & Swafford, B. G. (1977). Soil survey of Tulsa County, Oklahoma. Dept. of Agriculture, Soil Conservation Service.
Chicago Style (17th ed.) CitationCole, Everett L., Donald G. Bartolina, and Billy G. Swafford. Soil Survey of Tulsa County, Oklahoma. [Washington]: Dept. of Agriculture, Soil Conservation Service, 1977.
MLA (9th ed.) CitationCole, Everett L., et al. Soil Survey of Tulsa County, Oklahoma. Dept. of Agriculture, Soil Conservation Service, 1977.
Warning: These citations may not always be 100% accurate.