APA (7th ed.) Citation

Hatfield, J. L., & Karlen, D. L. (1994). Sustainable agriculture systems. Lewis Publishers.

Chicago Style (17th ed.) Citation

Hatfield, Jerry L., and D. L. Karlen. Sustainable Agriculture Systems. Boca Raton: Lewis Publishers, 1994.

MLA (9th ed.) Citation

Hatfield, Jerry L., and D. L. Karlen. Sustainable Agriculture Systems. Lewis Publishers, 1994.