APA (7th ed.) Citation

Bull, L., & Sandretto, C. (1996). Crop residue management and tillage system trends. U.S. Dept. of Agriculture, ERS.

Chicago Style (17th ed.) Citation

Bull, Leonard, and Carmen Sandretto. Crop Residue Management and Tillage System Trends. Washington, DC: U.S. Dept. of Agriculture, ERS, 1996.

MLA (9th ed.) Citation

Bull, Leonard, and Carmen Sandretto. Crop Residue Management and Tillage System Trends. U.S. Dept. of Agriculture, ERS, 1996.