Cita APA (7a ed.)

Hatfield, J., & Karlen, D. (1994). Sustainable agriculture systems (1st edition.). CRC.

Cita Chicago Style (17a ed.)

Hatfield, J.L, y D.L Karlen. Sustainable Agriculture Systems. 1st edition. Florida: CRC, 1994.

Cita MLA (8a ed.)

Hatfield, J.L, y D.L Karlen. Sustainable Agriculture Systems. 1st edition. CRC, 1994.