APA (7th ed.) Citation

Hatfield, J. L., & Karlen, D. (1993). Sustainable agriculture systems. Lewis Publishers.

Chicago Style (17th ed.) Citation

Hatfield, J. L., and D.L Karlen. Sustainable Agriculture Systems. Boca Raton, FL: Lewis Publishers, 1993.

MLA (8th ed.) Citation

Hatfield, J. L., and D.L Karlen. Sustainable Agriculture Systems. Lewis Publishers, 1993.

Warning: These citations may not always be 100% accurate.