APA (7th ed.) Citation

Alt, K. F., Osborn, C. T., & Colacicco, D. (1989). Soil erosion: What effect on agricultural productivity? U.S. Dept. of Agriculture, Economic Research Service.

Chicago Style (17th ed.) Citation

Alt, Klaus F., C. Tim Osborn, and Daniel Colacicco. Soil Erosion: What Effect on Agricultural Productivity? [Washington, DC]: U.S. Dept. of Agriculture, Economic Research Service, 1989.

MLA (9th ed.) Citation

Alt, Klaus F., et al. Soil Erosion: What Effect on Agricultural Productivity? U.S. Dept. of Agriculture, Economic Research Service, 1989.