APA (7th ed.) Citation

Harpstead, M. I., Sauer, T. J., & Bennett, W. F. (1997). Soil science simplified (3rd ed.). Iowa State University Press.

Chicago Style (17th ed.) Citation

Harpstead, Milo I., Thomas J. Sauer, and William F. Bennett. Soil Science Simplified. 3rd ed. Ames, Iowa: Iowa State University Press, 1997.

MLA (9th ed.) Citation

Harpstead, Milo I., et al. Soil Science Simplified. 3rd ed. Iowa State University Press, 1997.