Cita APA

Edwards, C. A. 1., Lal, R. 1., Madden, P., Miller, R. H. 1., & House, G. (1990). Sustainable agricultural systems. Ankeny, Iowa: Soil and Water Conservation Society.

Citación estilo Chicago

Edwards, Clive Arthur 1925-, Rattan 1944- Lal, Patrick Madden, Robert H. 1933- Miller, y Gar House. Sustainable Agricultural Systems. Ankeny, Iowa: Soil and Water Conservation Society, 1990.

Cita MLA

Edwards, Clive Arthur 1925-, et al. Sustainable Agricultural Systems. Ankeny, Iowa: Soil and Water Conservation Society, 1990.