Cita APA (7a ed.)

American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, & Kral, D. M. (1990). ORGANIC farming: Current technology and its role in a sustainable agriculture : proceedings of a symposium. ASA.

Cita Chicago Style (17a ed.)

American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, y David M. Kral. ORGANIC Farming: Current Technology and Its Role in a Sustainable Agriculture : Proceedings of a Symposium. Madison, Wis.: ASA, 1990.

Cita MLA (8a ed.)

American Society of Agronomy, et al. ORGANIC Farming: Current Technology and Its Role in a Sustainable Agriculture : Proceedings of a Symposium. ASA, 1990.